It is my first Solar Guitar. I cannot say that I am dissappointed. The guitar is good all around. The quality of the frets, the neck, the tuners, bridge. All is in very good shape.
Of course the guitar lacks features. This is why I cannot give 5 stars in that category. This is not a bad thing. If you want features like an evertune bridge or locking tuners, you should go for the A1-series. The A2 series is as basic as they come and does the basic stuff quite well.
The sound of the duncan solar pickups is surprisingly juicy. I usually use active pickups (EMGs and Fluence). The only weakness is, that the pickups are a bit too noisy for my taste.
This brings me to quality. The quality of the guitar overall is very good. You cannot find anything visible, that could have been done better. But I think the pickups are not installed completely perfectly, since they are quite noisy (as I said earlier).
Aside from that: I restringed the guitar with thicker strings and tuned it down to C standard. It sounds kickass!
If anyone is looking for a budget guitar for metal - this is a good choice!