I Know everyone dislikes BLT and it is TINY, but its got location, location location, I mean you can WALK to Magic Kingdom. . I have had three adults in a BLT at one time more than once, it's not bad at all. I wouldn't do more than that though. I have a reservation there for 3 adults over Halloween this year, originally I had Riviera but the ability to walk to MK won out.
On the other hand everyone loves OKW, and they are very large rooms, but I dislike the bathroom sink being in the same room as the tub and shower, and though I own at OKW I am just not a fan of the resort.
Probably my favorite studio is VWL Boulder Ridge, it's got location (at Wilderness Lodge, so boat ride to MK), its got spectacular theming, (Boulder Ridge is my favorite theme), and size wise its about average.
BTW I have stayed at studios at POLY, AKL Jambo, both VWL, Boulder and Copper Creek, BLT, OKW, and Beach Club Villas. I have a reservation for GFV this January which I am VERY excited about!
Jennifer