Depends… how do you like that answer. I’m a FiveSeveN owner, and I like mine, but I cannot recommend it to everyone.
For a fun gun that is flat shooting, low recoil and a likely NFA item IMHO, its great. If you want a firearm to use a lot, and be able to buy ammo at almost any location, then go with something else. As for shooting ability – well, in terms of blastic performance, then I would have to say no. However, in terms of accuracy/low recoil and flat shooting ability – then yes its worth it.
Let me put it this way – if you can accurately fire a 9 mm or .45, then skip it. If however, you have trouble firing these calibers, then its worth a look. My FiveSeven is the handgun my sister uses; because, she is small framed, and cannot really apply the concept of drop and lead very well.