EDIT: the first body part I received was a little out of shape (holes too small or too big, see below), Thomann team was superb (as always) in helping.
It's the first kit I've ever bought, so I won't make a comparison. I've a good friend, an artist, so I said to her: how about painting a guitar body? To prevent any counter-comment about the body of the guitar, she works as a restorer, mainly on paintings on wood.
Currently I own an HB 35, an old japanese strat and a gretsch acoustic guitar, so I decided to go on the kit also because I love the DC/SG style.
The neck is really a wonderful piece. Perfectly cut, thin, wonderfully comfortable. The fretboard is, too, really well made. I was really impressed before mounting the kit and now, playing the guitar, the neck is the best part. Another pro are the electronics, you don't have to weld cables, the two humbuckers are cheap built, but good.
With the guitar I received a manual in german and a manual in english referring to a previous model (the jackplate was on the front, not on the side like this one) and it is in black and white and explains how to fix a nut with an exagon key (even a monkey can do that...), 0 space to the wiring. Also, being In black and white, while the cables are colored it would be simple to do a manual referring to colors, with color images. Maybe it's not made in this way because the color may vary. Anyway I solved this problem by going on trial and error, I just inverted the volume and tone but understood that the volume is the one with the plug for the humbucker, the tone is the other one.
The really bad stuff was the body: the piece I received (even before being painted) had completely wrong holes. The stop tail and bridge holes too small, the pickup switch hole too, one of the pontentiometer doesn't fit very well and I have to fix it every time. Yet, the worst stuff was the jackplate. It was too big so the jack plug was unstable. I had to use a wood filler to fix it in a proper and stable position. I guess the neck is made in a different assembly line than the neck, because the difference is huge. Having problems with the jackplate and potentiometers (the jack was unable to stay in position for a long time, it went back inside the guitar. I received completely new parts to subsitute it and now it's fitting perfectly.
Another con is the strap plug, it's on the neck so when you play from 14th to the highest note your hand has to adapt to It. On the SG guitars is generally near one of the "horns". In this way I had to remove it.
The guitar is, nice. Probably at the first time I received a faulty part, now it's ok. I love the feeling of the neck, really smooth. The machine heads are cheap but ok, the hardware is ok. After setting the truss-rod and fixing the bridge for the action I wanted I found that the guitar was already in tune with the octaves. The sound is kinda gloomy and quite "Iommi" style, even when playing on the neck pickup, that's not bad, I like it. Probably the sound is influenced by the body, which is in cheap wood and really lightweight.
I guess it is a good starter kit with good customizing options (for example the pickups can be replaced with something more aggressive). Thumbs up