What are your impressions on a 15' round AGP ? Is there enough room in a pool of this size for kids (2) to have a good time ? Or is it akin to having an oversized bathtub in your yard ? Will the kids just lose interest ? Reason for asking is used pickings are slim and pricey. Except for an almost new 15' x 52" resin pool package with a new liner, already taken down and for $1150.