Good signing, good player.
The main concern I have is his injury record. He needs a good string of games behind him to show what he can do. We've seen glimpses but I think there's a lot more to come.
As others have said, he can play prop, 2nd row or 13 but may not be 1st choice for any of those.
The problem with him being on the bench is that we already have Kasiano, Philbin and the 2nd hooker there so it limits the coaches options if Harrison is a regular bench player.
And of course there's Bullock who I also think is underrated.
Obviously injuries play a part and it's not very often we have all players available.
Definately want to see Harrison remain in p&b for more quite a few years - as long as he doesn't have too many injuries.

I’m with Fez1, there is quite a lot more to come from Strider (copyright Captain Hook)

Waited long enough for someone to say that

Glad I could be of service