I've been using this about 4 months now and am happy with it. Only have it filled about a 1/3 full and have had no problems with it blowing away . Works great for food items I don't want my dogs to get into like corn cobs which before went into my regular compost bed and they would dig out. I will post more after I've had it longer.

I have done just about every kind of composting, and I've used various compost bins -- tumblers, in-ground units, open-bottomed on-ground units, Geo Bins, bokashi composting, etc., and I could not believe how quickly this sak heated up my compost. While I used to live on a farm and had plenty of room for my extensive composting operation, I moved to my elderly parents' condo to assist them a couple of years ago. I've been so frustrated at not having a place to compost and having to throw out food scraps. I couldn't take it anymore and started bokashi composting a few months ago, but then I didn't really have room to bury the bokashi, as you're supposed to when it's done with the initial cure. So I bought a big plastic tote, drilled holed in the lid and around the top, and mixed the semi-finished bokashi-composted kitchen scraps with some garden dirt and carbonaceous material, added a bit of compost starter, and it seemed to be working, but it never warmed up that much. I even thought my compost thermometer was broken. Then I got the Compost Sak, transferred the contents of my compost bin into it, with a bit more carbonaceous material, and within hours, things were really cooking, and the temperature got into the 120-130 range at last. I don't even have my Compost Sak sitting in the sun, which the manufacturer recommended. It just looks like a tidy bag of leaves, folded over, and isn't attracting any attention. Works well for my purpose. (I wouldn't mind if it were a bit taller, and a proper lid and handles on the sides to make it easier to move.)
Some of the negative reviews make me think the people simply aren't experienced composers, and that's ok, it can take awhile to get the hang of it. It's good to remember that there is no one composting system that works for all people in all circumstances, but this one work great for me, living in a condo with only a small patio with a few pots of herbs and veggies to call a garden. By fall, I'm going to have a lot of nice compost to mulch the landscape plants and my patio pots with.

The quality of this product is superb. It allows you to save up scraps and grass/leaves for composting while keeping pests out. My only reservation after 6 month's use is the functionality because it doesn't allow enough oxygen and is not suitable to turning the compost easily. But it is great for temporary storage before putting into a bin with the other ingredients to make great compost.

I love these - I have four now which I filled with all the fallen leaves from my yard. I'm tossing in kitchen waste on top and turning with a fork. Very practical solution

On my NYC terrace now, collecting my fresh food scraps and the dirt from this growing season. Last year I did exceptionally well composting in styrofoam containers that fish deliveries were packaged in. Switched to SAK this year. Hope I succeed with change.