Chip is cheaper. That's the only plus over a handheld. Hand held can update tunes through email, read trouble codes on any odb2 vehicle, not just the one you have tuned. Handheld also has data logging, also its easier and quicker to tune with.
---------- Post added at 09:17 PM ---------- Previous post was at 09:16 PM ----------
Chip has to be removed and mailed off to update the tune for any mods you have, then mailed back.
Just because something "can" be done, does not mean it should be done....