They're awesome. Got one in my slip right now.
They're expensive if you think of them as plastic tenders only, but they're comparable in costs if you think of them compared to life-raft costs. Another backwards way to think of it is, "why is a life raft $6K, it's just a round inflatable dinghy". Also pudgys are waaay cheaper than most of the RIB tenders with zoom-zoom motors that are on the back of lots of the powerboats and big sailboats.
The way I figure, I had budgeted for a nice sailing dink/tender and for a liferaft. Once I found the pudgy I was able to re-budget with both items in the same column and save money as well.