I've a few hours in a grob 115b (160bhp) and its ok, pretty benign to fly, no real vices
It if its spotless clean its quite quick, but in the summer with a few in dead flies, it seems to lose about 10-15kt!
couldn't say if its better than 152/172/pa etc as don't really have any hours on those and imagine the 115hp version will be underpowered. but think the B would make a very good learner.