From my experience it's a great idea. I wasn't a fan of G+ until we thought about using it for bringing people into the Blurtit community. However, since using it for work my perception of the platform has completely changed, and I would thoroughly recommend it.
This is because I think it strikes a great balance between some of the other popular social media platforms out there. It's personal, but not as personal as Facebook, it allows you to have a voice like Twitter, and like LinkedIn it has great groups (called communities on G+).
The G+ communities are the best way to recruit your members. People in these groups tend to be more up for chatting and networking than people are on Facebook, also the platform makes interacting and feeling a part of these groups engaging. I would suggest you network on communities in G+ about a particular subject or interest of yours then try to convince them to migrate to your community.
All in all, I find that if you put in the hours on G+ it is a far better networking and recruitment tool than most other social networks. What are your thoughts on recruitment? Do you have any good tips?