unfortunately, the things that make it soooo worthwhile to stay on-site can't really be see by visiting. but some reasons we stay at the BW:
~ once we get off the plane at MCO, our vacation starts. we just board an ME coach bus, watch some mickey "welcome messages", & we're there (no waiting for suitcases, no dragging luggage, etc)
~ having a wide variety of dining & entertainment, literally right outside our door
~ security is great (tho not obvious). i feel "safe" enough to walk around the resort, or go to a park by myself.
~ soooo quick & easy to leave a park, & go to another or back "home" for a rest, to swim, or if someone is not feeling well.
~ sitting on our balcony, & watching the "world" wake up in the AM (the BW area is gorgeous

), and/or watching fireworks from said balcony in the evening.
~ EMH evenings (we "don't do" mornings

), where on more than one occassion, the wait for rides was non-existant
~
DDP that saves us significant money & encourages us to try new restaurants without concern for cost
~ after an evening of dinner & Illuminations, leaving EPCOT via international gateway, strolling back to our room
~ having a few relaxing drinks on the BW with DH (BRG or jellyrolls), then just walking back to our room (no designated "dry" driver, taxi, etc)
as with many resorts, the BW area is not "mickey-fied", but has subtle disney touches, with the feel of a quaint, elegant resort.
i think the main reason we won't stay off-site again is that on-site feeling of being at an all-inclusive resort, where
every minute of your vacation actually feels like you're on vacation.
