For resale purposes, free standing wins over attached. Location advantages for the two is subjective as they each have their own perks. Both are overall good investments. Choose the one that works best for your situation.
Read his/her previous posts. This isn't the first time they've posted about PS (particularly Luna). I'm sure he/she are well aware of the pros and cons. Why beat a dead horse?
The fact that you have to ask whether or not PS is any good after it's been discussed over and over again is very telling in itself. I'm assuming you already live there and were expecting a pat on the back?