We used these spacers/leveling system to install 12x24" porcelain tiles with staggered joints. The tiles are not perfectly flat and raise slightly in the middle, which I understand is common with larger tiles. This makes it much more difficult for the do-it-yourselfer to minimize lippage.
The leveling spacers were easy to use and worked perfect to keep the tiles level with each other (we also used a level to ensure the tiles were level to the floor). Our biggest fear was that the spacers would be hard to remove as we had read comments to that effect.
We tested a few by bending them to one side before installing under the tile. After the mortar set for the recommended 24 hours, those spacers came out very easily by pulling up with your hand (after removing the yellow wedges). With the others, we removed the yellow wedges and tried a slight kick, but they did not come up readily (probably due to getting stuck in mortar). We did not want to tap with a hammer (as with our luck, we would miss and get the tile). Instead, I used a pair of pliers, grabbed the spacer directly above one of the teeth/prongs farthest from me and pulled towards me at a 45 degree angle. This worked perfectly and the spacers came out very easily and broke off at the base, as designed (as the far side tooth/prong gave way, the nearside one readily gave way). The yellow wedges were heavy duty enough to hold the tiles in place with ease. I would buy this product again.

I'm in the middle of tiling my master bathroom with my dad--he has done some tiling before but this is my first tiling project. We are using 12x24 inch tiles which we quickly discovered are hard to lay down without lippage. We started with a shower wall, which was further complicated by the waterproofing membrane that we applied to the cement board--there was some slight variation in thickness that was exacerbating the lippage. That led me to look for a leveling system.

It was immediately clear just how effective this system is. As each wedge was placed, you could see the tiles evening out with each other. I went ahead and bought the pliers, which were WELL worth the additional $10. They made pushing all those wedges into the clips a breeze. I'm not sure that the wedges would have been as effective without the strength the pliers apply--the mortar we used was forming a really tight bond instantly and the pliers were able to do that little bit of lifting sometimes necessary to align the tiles.

Removing the tops of the clips after the tiles are set could sometimes be an issue where the mortar oozed up a bit around the clip, which was kind of hard to avoid. At first I almost removed a star just because of how frustrating it was to dig out the little bits of plastic left in the grout joint when they didn't break off perfectly. However, after I started to wiggle the clips back and forth a few times like a loose tooth before whacking them, they started to break off more cleanly. Be warned though--even when they break off well there will still be some plastic stubs left in the joint; we haven't grouted yet so I don't know if that will be a problem, but in some cases I took the extra time to get as much of the plastic out as I could. Regretfully, I have ended up with a number of chipped edges where I had to dig out the clips that did not break off cleanly--I used a putty knife, a rubber mallet, and a thin diamond grit file to knock the bits out.

The one other frustrating thing has been that they don't sell refill bags of clips. My bathroom is large, and we are tiling the floor, shower, and the bottom third of the walls. We are about 2/3 of the way through and are out of clips; I assumed I could get a bag of just clips, given that the wedges are reusable, but it doesn't appear that they offer that. I have to buy a full set again to get enough clips to finish. I know that other sellers offer replacement clips, but I was hesitant to trust that they would fit right; considering they cost the same as this system I just went ahead and got the full set again.

My final verdict: I cannot imagine laying tile--especially large format tile--without these levelers. Considering how much I've spent on remodeling this bathroom, the cost of this system adds almost nothing, but the improvement in the quality of your finished project is worth every penny. I wish I'd used them right from the start, but my folly only serves to prove to you that this system makes a measurable, visible difference. I could not recommend them more.

Spacers we're great, wedges felt tight and secure with "ratcheting" under the spacer clips. Removal of spacers after tile was set was painless. Just knocked them off with a rubber mallet. They broke exactly from where they were intended. Just make sure you give adequate distance from a wall or tub so you can get a clear swing on the mallet to break them away completely. You can reuse the wedges too.

Used these with 12x24 tiles in a shower. They really worked great to keep the tile surfaces level and even. Half the price of the same thing sold at the home centers. Only issue with this style of spacer is that the mastic can squeeze up under the shim which becomes more difficult to scrape out once removed. That's not a knock against this product but a generic issue.

These things are great. Especially when ur concrete slab floor is uneven. Super easy to use. Removing them is gonna be a task for tomorrow. I'll update after removal. Slide easily under and between each tile. I'm a 30yr old woman with moderate home Reno experience. But this was my first time using "luxury" spacers. It definitely was worth it for my project. My subfloors were so uneven. Can't wait to see how minimal lipage i have! It looks so professional.

I knocked off a star because u should get the same amount of levels as u get spacers. I get some ppl do need that many levels, but for us folk with crappy new builds we need all of them! I've already used 3 boxes of them. Just had to overnight another box so i can finish my bathroom floor.

**update: removal was super easy! My kids had a blast kicking them off! Still leaving it at 4 stars due to the quantity of levels being low. Very happy with how the floor turned out! So many compliments on how professional the floor is even tho I'm an amateur lol

**update 2: removing from the wall tiles was much more difficult than the floor. Overall still very happy with these levelers. Reduced the serious lipage our horrible uneven walls gave the tiles. This was overall an amazing purchase! Check out the pics of the final look of our master bath tiles. Worked on the two styles of tiles as used!