We are currently getting bids from several companies for a large, inground pool in our backyard. We are trying to decide between a higher upfront cost for the fiberglass pool, vs. lower initial cost with the vinyl-lined, but the future costs in liner replacements. So my question is:

-Realistically, how often are most people replacing their vinyl liners? I've got the fiberglass company telling me 5 years, and the other companies telling me 8-15 years. Our pool will most likely be uncovered most of the year.

- And what are the expected differences in maintenance, as far as keep the two pool types clean? Is the vinyl lined pool a lot harder to keep clean like the fiberglass company is telling us?