I just came back from a 4 night stay in Aruba and had a very pleasant time.
The Shluchim there are the most amazing people, they occasionally have kosher food service although you must contact them in advance.
Their Chabad house is a 5 min drive (25 min walk) from the Hyatt. They had a really nice Purim party and are very welcoming.
Hotel:
I stayed at the hyatt regency. No, this hotel is not even close to a category 6 hotel. However their grounds are really nice with a fun water slide
The service and rooms and everything else is really bad there, not a first choice.
The most disappointing thing is the porch in the room which is barley enough room to stand on, never mind to sit and relax.
The weather there is AMAZING, constantly sunny with a nice wind at 15MPH.
All in all, although there is not much to do there, but because of its close proximity to new york, I would definitely go again!