The major components (frame, slide and barrel) are simply of EXCELLENT quality.
The smaller parts (leaf spring, etc.) not so much. In fact, they're likely to be pure garbage.
I bought mine from a friend for $300, around ten years ago. It had a problem with the hammer "following", so I pulled the mainspring housing to have a look at the leaf spring. It was BRIGHT red with rust. It had NO finish of ANY kind on it, where a normal part would be blued or parkerized.
The guy who works on my guns replaced a bunch of the smaller parts and did a little tuning. Now it's 100% reliable and has a EIM legal 4lb. trigger. It's one of my favorite carry guns.
As an amusing side note, when I got the gun, it had the factory "GI" brown plastic grips. The first time I cleaned the gun, I flushed the frame out with some Outer's Gun Scrubber spray cleaner. I went to set the frame down to check on the slide... and COULDN'T! The Gun Scrubber had melted the grips to my hand! I'm not sure what they were made of, but it must be akin to polystyrene model plastic. I trashed the grips and got a set of Eagle fake ivories, which look really good.
The sights aren't as nice as more expensive guns, but they are three dot, if rather small.