LOL.. Yes - bathrooms are definitely a consideration.. Three adults with one child and one bathroom just isn't going to cut it.. Makes those 3 bedroom, 2 bath villas mighty attractive..
The main reasons for staying on site for our family is...
1. Transportation
2. Focusing on Disney
3. Being close to the "Magic", instead of down 192!!
I agree with the first post, its hard to explain. Beleve me, Im not bias to the whole offsite thing, because ive done it MANY times. We have 3 weeks with Interval International and instead of using them in Orlando, we opt to use them at other destinations, in Florida or Mexico.