Thank you for your comments re the automatic pool cover. That has been a huge decision for us, due to the expense, but I decided to make it a priority. Your comment really helped with that. Did you use Pool Covers Inc? Any tips, suggestions? I need to look at your notes, but I'm assuming you didn't go with a salt generator?
Yep, Pool Covers Inc. seems to have a monopoly on auto covers around the whole Bay Area. Unlike virtually everyone else who's worked on my pool, they really know what they're doing and get things right the first time. The initial install is expensive, but you'll get some value over the life of the pool from retaining chemicals, water, and warmth, and, of course, keeping junk out.
Tips & suggestions? The cover is a pretty simple device run with a motor, ropes, & pulleys. Just try not to let debris into the vault where the cover rolls up; it's easier and less gross to blow or brush debris off the cover when it's closed. In other words, don't open the cover when it's covered in leaves in the fall until you've cleared the leaves. There's no real maintenance other than cleaning out the vault when it needs it and oiling the motor/shaft annually. I have PCI come out once a year in midwinter and do that maintenance at a cost of $225. They check the whole system at the same time and re-align anything that needs it.
The vinyl cover will eventually develop pinholes and even tears. You can patch them yourself. At install time, ask PCI to leave you some extra fabric and a patch kit. There's no charge for that. Finally, the vinyl will wear out. The main stress point is where it drags over the spa walls every time you open and close it. The best you can do there is to have your pool builder install nice smooth, rounded tiles on those walls. When my vinyl wore out, PCI also replaced the rails, ropes, and pulleys. The only things they didn't replace were the motor and the spool. They warned me the new ropes might stretch unevenly and require a (free) service call to align, but mine didn't misbehave.
I didn't get a salt generator. A pool has so many breakable moving parts I decided not to add one more. It's not that hard to manually add chlorine and/or use pucks. With new water, pucks are fine until your CYA rises to the level you want it to be at. That reminds me, the vinyl cover likes normal pool water. If you ever have to shock or SLAM your pool, you have to leave the cover open until the water returns to normal chemical levels.
Enjoy!