I'm new at this also (we bought an 18x38 Doughboy because that is all that is offered in our area that can have a deep end) and at that time I hadn't came across this forum.
The BIG lesson we learned in hindsight is to really investigate your installer and company. We didn't, chose based on price, and found out a year later that he had 4 complaints through the Better Business Bureau. Our warranty is through Doughboy, so we don't really need him now, good thing since he is out of business and running a coffee shop instead.
Anyway, might be worth checking out if you haven't already.
Kerrie