My opinion: it is great and I do not change.
My son is 9 months so sleeping in a real bed with pillows to prevent it from falling is not an option since it makes fours suddenly I take my Phil & Ted's everywhere. I have a dinner, an afternoon with friends or I go alone traveling with him I still manage to get around on the Metro with my stroller, the diaper bag underneath my Phil & Ted's on a shoulder my handbag on the other shoulder or hanging on the stroller.
Basically if you are a single mom with only 2 arm to move a baby and all that accompanies this bed is a very good solution :)