I was wondering, how easy are these to build, and what do they play like when they are built?
According to most who got the Saga kit, you'll probably end up replacing the tuners, the electronics (pots and switch and caps), and the PUs.

Otherwise, they're a fun way to learn about putting together a guitar and refinishing and a bit of electronics (you'll need a $12 soldering kit from Radio Shack so you can do the PU and electronics upgrades).

Go for it or buy a used Squier or Ibanez.