I'm considering purchasing an in-ground pool. I'm looking at a vinyl-
lined in-ground pool constructed using polymer materials (walls &
support structure). Anybody have any experience with these - positive
or negative? I live in the northeast - do they tolerate the cold
weather pretty well? The salesman I spoke showed me a section of a
pool wall that they had set up outside their showroom, and it appeared
to be solid.

I am not considering Gunite construction as it is out of my price
range. If polymer is as good as the pool salesman claims, then I'd
rather stick with that and maybe get some extras rather than be "pool
poor." I'm also reluctant to go with steel out of concern that it
won't last as long due to rusting.

Any input would be appreciated - Thanks!