Even so, what they can do is kind of cool. The submerge themselves and crawl all over the bottom and sides of virtually any pool, cleaning all manner of grime , flotsam and jetsam from your otherwise pristine pool.

At $799 for the 300 and $1,199 for the 600, these aren't check-out-counter items at your local pool store. Then again, pool boy services probably cost at least that much a year.

Read the longer report at PCMag.com