I have looked at them in stores and they seem unstable to me. I use a 6' long folding banquet table now, until my DH makes my new one. If the table is too short, get 4 lengths of PVC pipe from Home Depot cut to the length you need (mine are about 6"), and put them on the feet. This raises the table and helps keeps it stable.
My plans for a new cutting table are to use 2 Ikea Expedit units back to back, with a base and a top- easy and cheaper than these tables- and there will be loads of storage too. Check out the Ikeahackers website- lots of ideas.