I thought he ran well last season with the few opportunities he was given. I like the burst of speed he has when he sees the opening - this is great when you have an OL that has a hard time opening lanes.
The guy might be short - but anyone who has played football in high school or otherwise knows damn well not to judge a player by their size. I rarely see Sproles getting flack for his height, so why Harris? If he does not get the starting role, I would still like to see him take some snaps - he has proven that he can get the job done.