I haven't booked lessons through Thomson but my girlfriend has. How hard is it to just join lessons when you are out there and how much do they normally cost (i'm a snowboarder btw).
Leckie,
If you are going to Pamporovo, go to the snowshack and ask for lessons. They are much cheaper and much smaller groups. When we had our lessons two years ago it was 30 lev each and we had 3 people in our group.
Leckie - 30 leva each per session. Each session started about 9ish I think and finished about 12. It depends on the size of the group though, less people will be more money.