The dedicated units also only have one internet connection, not two like in a lock-off, and they only have one AC thermostat that controls all off the rooms. In the lock-off, the second bedroom has it's own thermostat.
A separate air conditioning unit, a separate door and my own coffee maker/fridge/micro. Hmmmmm, maybe we'll go with a lockoff 2BR when we take the in-laws. And to boot we won't have to look at the mess the kids (and the big kid, BIL) makes.