A few weeks ago, I spent 2 solid hours researching a dozen different wobble/balance boards to use while standing at my work desk. Ultimately, I decided upon this particular one and I could not be happier! The primary reason I purchased this was to provide my right ankle with continuous movement throughout the workday, as I have a chronic condition called Tendinosis.
The board is super lightweight to move around, and curved (rounded) bottom of the board provides the right amount of movement for use while working. I've read that some boards are too wobbly, while others do not provide enough. This one is perfect!
I use this to rock from side to side and to rock front to back. When using to rock front to back, it provides an awesome calf stretch and overall calf workout. When using from side to side, I can spread my feet really far apart if I choose because the platform is so long. Sometimes I will balance on one foot or do a walking motion on it to alleviate pressure on the bottoms of my feet. Another great feature are the grips at each corner. These prevent the board from sliding around on the floor when tilting from side to side.
I always use this with my socks only. I found that if I use it with my tennis shoes, it is uncomfortable for me (too hard). The cushion on top is not super cushy, but if I keep moving around on it, I can stand for 4-5 hours straight. It would be nice if the board had thicker cushion on it, but it is adequate as it is. And, the grip pattern on the board keeps my feet right in place.
If you are looking to add some movement to your workday while standing at a desk, this is a fantastic board to try.

Great. I do not fall over. I can stand for hours and forget al about it.

Today is my first day using my Gaiam Evolve balance board, so far I like it. I've tried three other boards and this one seems to offer more than just lateral moves. I like the forward and backward movements giving my calves a stretch as well. However, when I opened my box and inspected my board, I couldn't help but suspect that I was sent a used/refurbished board. It's obvious to see one of the bottom pads was glued back in place. There are fingerprints left behind from the glue! In addition, one of the larger top pads is already coming unglued as well. I paid for a new product, the description did not state used or refurbished. My review will be updated if/when the manufacturer corrects this. See the photos
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Update: 8/24/17
Received a replacement Balance board and I'm very happy, Thank You Customer Service. The new board is a big difference over the first one, its noticeably higher and has the GAIAM logo on it. Clearly that first board should have never been sent out. Many Thanks!

Love this balance board. I use it in mornings while preparing (brushing teeth, etc) for my day — then adding a few squats just for fun. In just a couple weeks, I saw improvement in my balance and ability to put on socks & shoes without having to sit down or lean against something to keep from falling. The comfortable design and quality definitely make this an excellent choice.

I love this board. Seems like good, solid construction. Top is definitely anti-slip. It is stable enough in its normal position (as shown) that one does not have to worry about falling off (not that you would fall far!), but can be rocked side to side and front to back (stretches calves – sooooo nice, feels soooo good), also I twist it sometimes to rock widely front to back with one foot in front and one in back. Can use it in its normal side to side position with feet relatively close together or farther apart as I sometimes find myself desiring. Is very nicely wide. I have a plastic floor mat under my desk at work, so I use this on top of an anti-fatigue mat so it doesn't slip – have not tried and slipped, just am afraid it would. Works great with the mat and perfectly for my purposes. Helps get me moving while I have my desk in standing position and sometimes is nice to just adjust my chair up a little and put under my feet while sitting to rock especially in the short, normal front to back to stretch my calves – feels great! Thanks, Gaiam, for a well made, and very thoughtful product!