For one, any big man (6'10" or taller) with a consistent hook shot is a threat, regardless of anything else. So, in itself, it's deal. Add a vertical leap to that and you get a Kareem Sky Hook... unstoppable.
Now, add a bit of a shot blocking presence against a pre-existing shot blocker (everyone forgets that KG will be by his side), and you've got a great player off the bench. Oh, and did I forget to mention Pierce?
All and all, it's a good place to be. A guy who can grow with the three 3 and Perkules and eventually find himself in a key playoff situation.