I did a lot of research on this gun before buying it. It was just about universally agreed by the many reviews I had read that the gun was high quality especially for the price. After receiving the gun I was definitely not disappointed by it aesthetically or by its performance. After charging the battery for three long hours and taking it outside, the gun(with slight adjustment of the hop up) had excellent accuracy and groupings out to at least 75 feet(the longest distance available in my back yard, but I am sure it can perform well past that distance.) Overall the classic army sportline is definitely superior in quality to its echo1 counter parts, since that seems to be its main competitor.
To be a little more specific, the target I was shooting at was a 3x3 inch square at 75 feet. I hit it with every round I fired after adjusting the hop up accordingly, which took less than a minute. So if it can hit a 3x3 inch square at 75 feet every time, it definitely can be affective and much greater distances. Not bad for a stock gun.
Very solid and robust
Very good attention to detail and quality control
Great ROF and FPS out of the box
Hop up although slightly inconvenient in placement, adjusts very well
Shooting glasses included are great
BB's included are great
The only con towards the gun itself is the flash hider. The entire gun looks incredibly high quality and the flash hider looks so plastic and toy-like that it really doesn't seem to fit in. That is easily fixed by either removing it or spray painting it though.
The sling included is the cheapest sling you can possibly find on the market
The charger included is definitely sub par
Really those are just about the only cons
As a side note, airsoftgi really needs to work on their status updates. I have the gun in my hands right now and yet the order status is still "package processing" as it has been since day 1 of the order.