Yes, ORobbed is right!, the best investment for your game is taking lessons, and I'll tell you why. My first year bowling was a waste, trying to learn from my friends. What I learned was a series of bad habits, that when I started my lessons form my coach, he had to root out, and that can be a problem, because, after a year of repetition of those habits, they where entrenched in my muscle memory. It took a lot of work from both parts to get it right ( And I'm still not done, I need a lot of work), but from 129 avg, I made a jump to 178, and then to 205. I'm now on my 6th year and 5 of them with my coach ( I was on and off for a year,when I thought I didn't need him anymore, but I soon realized that I still have issues to be worked on). So I'm now fully convinced that every one can beneffit from a coach, specialy a reputable one, you just have to be open minded and do what he is triyng to impart ( never say "I can't do this", that translates into "I won't do it", and that's a bad sign it means your'e not willing to do what it takes). Hope this helps, bye.