I own one and love it. I string a couple of racquets each week. It is rock-solid and the best design - so quick to string with.
However, I have customized mine somewhat. I've put a modern 6-mount head on it which I got from a Klip gravity pro (I think). The head fits perfectly into the body of the Oliver and it's now the best of both worlds - modern head, foot-operated gravity pull.
I can take a few pictures if you like. Also have spares for the Oliver if you need them...