Here at IIS we have been operating a HP3000 959/200 for a year and a 969/200
for three months with no known allocation or low level CPU problems.

The only pieces replaced were the DDS-2 dat drive on the 959 (a number of times)
and the multi-function I/O card on the 969.  I think the only time the 969 has
been down was to replace the I/O card, can't even remember nary a system crash.

I'd call that RELIABLE and nearly problem free.  A few words of advice - buy,
Buy, BUy, BUY.