iMovRErgonomic Balance Board for Standing Desk - Black

I wanted to like this board, but the standing surface is covered with sharp little nubs. If you stand on this board for more than 10 minutes with either bare feet or with socks on, the nubs HURT! I don't have sensitive feet - I walk around outside with no shoes on all the time, but it feels like you're standing on a bed of nails after a few minutes on this board. I purchased this for home use, to use without shoes. It may not be as bad if you've got shoes on the entire time you're using it. The concept is good, the execution is poor.The standing surface on this board also seems small. I have size 10 feet, my feet cover this board front to back, so not much room to shift the feet on the board. I have another balance board with a solid, flat top, I bought this one to switch things up. I stand on the other board for 5-6 hours every day with no issues.I bought direct from iMovR, it came with a "100 day, 100% satisfaction guarantee", which was good. However, you have to pay to ship it back (this is disclosed up front). I've shipped mine back, at my own expense.