i agree that it depends on the trainer - it's important to find one that suits you & will keep you motivated.

the things i like about doing PT are

- i work so much harder than i ever would on my own or even in a class. they know how hard they can push you & where i may have thought i'd reached my limit, they'll show me that i can actually do more
- i stick to the appointments & don't make excuses like i may do if doing it on my own
- it feels like a treat - for 45 minutes it's all about me.
- they change things around after a while so that you're not just doing the same programme again & again
- they help identify areas where you've improved & really make you feel like you're achieving something

for me the biggest thing is the first point - i'd be inclined to think i was working hard enough but they've shown me i can do so much more than i realised.