Alright, this may get long, so bear with me.
I have this rifle. Out of the box, performance was alright; nothing to really brag about. You really have to upgrade it and fine tune it to get it to perform well.
The overall quality of everything was great. The internals really surprised me because they are a decent type of metal.
There are actually a few upgades for this rifle, which aren't needed right away. The spring, barrel, and bucking are all AEG compatible for this rifle, which makes it very easy to do the basic upgrades.
This rifle really needs a PSG-1 style spring because they are longer than a standard AEG spring. You can put a normal one in, but you will have a slight power loss. I've upgraded my spring to a Systema 400% PSG-1 spring (strongest made for PSG-1). That has bumped my FPS up to 460 FPS with 0.30g (roughly 560 FPS w/ 0.20g) after he spring has broken in.
The stock barrel isn't too bad, but you should probably replace it with a nice AEG cut of your choice, or polish it. I saved my cash right away and just polished it an received great results.
The bucking should be replaced out of the box. I replaced mine with a cheap MadBull red bucking. That helped out a lot.
Since I put the monster spring in my SVD, the piston sear started to wear, so I replaced it with a steel one. The stock sear is a very cheap metal, but lasted me a long while even at the high FPS. It never really broke, I just replaced it while I was cleaning the rifle so it wouldn't happen at a game. Here's the link to that sear:
Once you have those few upgrades squared away, you will be golden for a long while. Eventually, the strong sear will start to wear out the piston at the point where it catches he sear. This hasn't failed me yet, but it has some pretty nasty wear marks on it. Here's a nice looking upgrade piston that allows you to use any AEG piston head. This should solve the strong metal on weak metal wear. Here's the link:
Here's another small upgrade. I haven't bought this yet, but it's supposed to keep your spring straight and stop it from bending inside the piston:
That's pretty much it, but you'll be wanting optics to sight in your high FPS rifle. I would recommend a real SVD scope, or a Romanian one. I'd part with my 4x Romanian one for around $90 if you wanted to buy it. The rail requires a tad bit of filing to get it to fit, but fits great once you do that.
Once you have a power upgrade and a new barrel/ bucking coupled with quality ammo, you will have a very nice shooting rifle. I definitely recommend this rifle for new players. It's very easy to take down and upgrade. The rifle itself and upgrades are also very cheap. The only downside is cocking this rifle. It's very difficult to cock, but you will get used to it. I can now chamber another round while laying down after getting used t it.