Numerous stays at the Poly (back when room rates were more reasonable) but the kicker for us is the pool (main pool).....it is small, gets quite crowded....limited (very) limited amount of lounges and chairs with a table actually by the pool.....on more than a couple of trips we ended up at the quiet pool just for 3 lounge chairs together (my peeve, paying big resort rates to use the quiet pool since the main one is packed)...
We've seem many of non resort stayers undress at the pool and enjoy, more so than any other resort (might be it's location on the monorail and MK guest deciding to use the pool) who knows and we don't care but it just jams up the pool.....we've moved on from the Poly just for that reason....we break from the parks daily to return to the resort to use the pool, lay out and relax.....too much of a chore at the Poly and no, they do not have any hot tubs......
Also, on more than one occasion, we've seen guests come down first thing in the am and place towels on 4 or more lounges to save for later in the day...we know so because we use the pool first thing in the am and might be there through the day, and they never came back...really not enough lounges for that type of activity...really tuened us off the Poly....good luck!