We've both stayed at a value (Pop Century) and stayed offsite at one of the more popular Good Neighbor resorts near DS. We prefer staying on site because of the luggage transfer option. If not for the luggage transfer option, I'm not sure it would make any difference as long as you are staying at one of the more-reputable offsite options (despite the many many times we've been to WDW, I'm not sure if the Florida Project is reality or not, but I don't want to be in a position to find out first hand because I would never be able to get that guilt out of my mind!). We tend to fill two whole bellman carts with our luggage

so there's some major value for us with that service. We tip very well, so it's hardly "free," but, nevertheless, money well spent.