Do we own a Lemon?

We have a classic icat that we purchased in 2005. Since then, we have had many repairs from y-rotors to mother boards, to updating the computer, and finally last fall the complete upgrade. Now the beam limiter is not working, and that was worked on two years ago. To complicate matters, the replacement parts did not work most of the time, and we had lots of down time because parts were also not in stock. We are now waiting again for parts that are not in stock. So, is everyone with the classic having similar problems, or do we have a lemon? (Don't get me wrong, I do like the icat--just wondering what everyone else's experiences have been!)