Everything comes down to the implementation at the end of the day. We've had people come into our Meditech 6.x shop from other shops (Cerner, CPSI, MAGIC installs) and comment how much Meditech was an upgrade, and I'd see Epic users complaining about the downgrade all the same.
The entire region's gone up to Epic now thanks to mergers from larger systems, and every site that had everything prior now (especially that crummy little CPSI system) agrees that Epic is now the best thing since sliced bread.
Coming into it though finding out just how much lives in the system... wow. I was amused to see that HR very much lives alongside nurses in the same system (Meditech's HR modules... and an employee portal that quoted copyrights from 1995 from Photodisc!).