I have never dealt with Andy, but if, by quality, you mean manufacturing quality, then they are ok (not great, but ok). If you mean accurate, relative to a specific gen model, then no, the quality is poor. Specifically, regarding Alligoat's comments about using Silix cases, you might want to read this, this & this. And to update my 'still waiting' comments in some of those links, to date, I am STILL waiting (& receiving email excuses from Silix describing yet more delays ).