we have two, and have had 8 wonderful years with them so far

we selected the breed more for personality than looks, belive it or not. We had read that they were very 'dog-like' in personality. That has been very true for our male. He is constantly by our sides, involved in everything. He's a lap cat and seeks approval constantly. Our female has always been slightly skittish, probably because she is TINY. Our male is 15 pounds while our female is only 5 pounds! They were litter-mates.
They WILL jump (they can jump from the floor onto the top of a door (about 6.5 feet!) and love to get on top of high places. They are both great mousers.

so far we have had no health problems with them at all (not that I expected any but with any 'breed' it's a good question to ask)

I would say that my experience has been that like all cats, individual personality varies alot.