Don't be too disappointed when you lose lessons you have booked due to bad weather. It's the most frustrating thing I found when doing my PPL.
Also, if you can possibly do so, don't pay up front for the whole course: pay as you go. If you have to pay a substantial amount up front: make sure you pay it on a credit (NOT debit) card. That way, if the flying school goes bust you can get your money back.
Other than that: go for it and best of luck!
Edit: also Pace is absolute right about making sure you get the right instructor: that's probably the number one factor.