Don't know loads about it though I know I was going to buy one when I first started in the sport.
They are fairly indestructable from what I understand, the smaller brother often being used as a rental gun on sites for that reason.
They are good for rec ball I'd say as they are mechanical and so the rate of fire would be lower, 6-9bps (others might disagree). Just depends what you want the gun for really. It's very shiny!
Usually runs on CO2, good if you are playing in the woods as most sites supply CO2, less with air. If you want to play tournament type games I'd not recommend it.
Hope that helps a bit.