It is functional and I use it since I didn't want to bother with the return. However, one side of the board is warped and one of the knobs was slightly defective so the board is not stable when flipping.
It's huge, and it flips for ease of use. If one is particularly short or tall, it would be difficult to use the entire board. The price was good. With the design it's not a bad footprint in terms of storage space. I wouldn't want to have to transport this thing often.
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