The best one and at the best price was a 1" maple sapling cut to the proper length/height with a "Y" in it. Took the bark off of it and sealed it. What made it even better is that it had been used as a rub and I shot a nice eight point with it the day after I cut it. That was about five years ago and I still use it.
I found my pole cats just a smidge too short for using on one knee or sitting.

Keep your powder dry and stay frosty my friends.