Jannewein serves the skiiers in different ways. They rent and sell equipments for you and they rent lockers also. I found the lockers very handy as I could leave my extra bag in there for a day and I also left my shoes in their storage.
Whatever anyone tells you, if you are a beginner skip your group and take some 5 days skiing lessons (or snowboarding)
Lessons are fun, teachers are young and energetic, and you'll meet new people in your lesson sessions
Equipment: Rent the ski pole, ski boot and ski's..around 165 EUR for 6 days
Don't bother with buying anything else they'll try to make you take (helmet, gel for boots..etc)