The solution is stable. I would rate it as four out of five. 

The solution is highly stable.

This is a stable solution.

No, as I said, we had fixed the issues, so that it was stable. Once we replaced the child guard, then it was stable. Now, we don't have any problems. So earlier it was not, but later on it was stable.

It is now working for us well.

The stability of this solution can be improved.

In terms of stability, I've found it to be very stable. I've walked into the server room when it was at 60 degrees Celcius, and it was still running fine.

The stability is very good.