I've had this installed for about 3 months, and during a rather heavy oak leaf drop in Florida. The screen has done fairly well so far. I have supports every 24" running from the house facia to the outside edge of the gutter. The screen sits on top of the supports, and sags a bit in between each support ( you can see a support in the picture). If your supports are more than 24" apart, I would guess the screen would sag so much it would touch the bottom of the gutter, rendering the screen somewhat useless. Small twigs get caught in the screen, and a light collection of leaves piled up on top. The screen has prevented my gutters from constantly clogging, like they always did before. It's hasn't degraded at all so far.

UPDATE: After about 6 months of use, these are still holding up fine. A bit more sagging in between my gutter supports, so I'm thinking about placing something like a non-biodegradable pool noodle inside the gutter to provide support. My gutters haven't clogged at all with the gutter guard, whereas before they would completely clog every month or so during leaf drop season.

The mesh is easy to install, but has washed out of our gutter twice now. It does work well to keep leaves out but the holes are large enough that it will allow some tree seeds in. Also the edges are very sharp so wear gloves when you handle this.

After 1 month of installation they still hold up. Haven't seen any leaves falling off but the maple "helicopters" are all stuck in the mesh. Looks weird but I'm not fussed. When installed I didn't cut out those dents on sides for slats, I think not necessary. Seems it will also hold up snow since it has a nice curve upwards. When installing I unrolled the roll backwards so it had some more tension to it.

These are the ones you want if you live in an area that can have heavy rains. Other guards with less open area will cause some of the water to miss the gutter.

They aren't perfect, but then again, no product is: It greatly reduces debris from getting in the gutters, but some will obviously get through. I only have to clean the gutters under an Oak tree twice a year now.

I've bought a total of 6 of these. I tuck them under the shingles and line up the lip with the outside of the gutter so they are barely noticeable.

Tip: I unroll it and leave it in the sun for a couple of days with a few bricks to help flatten before install.

Great product as far as installation and purpose! With that said.... its very light weight and god forbid you ever have a squirrel or a heavy wind storm. I installed these in my gutters within 2 hrs. They work great. I have had them come out of my gutters a few times because of a storm or a squirrel thinking he's Rocky and can jump off of it. Simple fix was attaching some simple heavy fishing line weights to them with pliers. Extremely cheap and practical in the long run if you don't want to pay an arm and leg for gutter gaurds to be professionally installed. Love this!