Well to start off, this gun looks and feels great! The weight feels realistic, but I wouldn't recommend running around with it all day because it can be a bit cumbersome. The magazine is also a unique feature that I don't necessarily like, because it will not fire (even for testing) unless the mag is at least halfway full. The price may be worth the quality, but definitely not the performance. After about 100 rounds of Madbull .43g bb's it started slam-firing, and with inspection the sear was completely shot. So I sent it back and received it "fixed" a few weeks later. However, after 20 rounds the rifle again started slam firing. Use caution when ordering Ares products, I'm not sure about their AEG or GBB line, but after two breakdowns in one month and with it being proprietary, the company doesn't seem to be worth the problems it has.
Polymer (maybe a con for some)
Weak pot metal trigger assembly
Doesn't include the extra muzzle piece