A service that never goes down cannot be evaluated. So I always discard the "never had a problem with them" because that talks well about hardware, not support.
I've been Reliablesite for several years, and now I am leaving them. Why? Because of the basic and taciturn support.
Each and every time I had a hardware issue, they don't contact you back until they solved the problem. No matter if that takes 15' or several hours. That's not good. One has to keep the client informed of your progress.
A week before I was completing the migration out of Reliablesite of my only dedicated server, they came up with an urgent "datacenter migration" that implied an IP change.
So, while I am writing this review, I am waiting for 2 hours now that support guys update the cPanel license with the new IP. TWO HOURS so far to login to cpanel, update the ip, click submit, and voila! Happy customer.
As you see, poor planning, zero bottleneck avoidance.
I hope this review warns you about this company.
The two hour wait ended up in SIX HOURS. They took six hours to update my cpanel license. As of today, I am finishing to move my business away from this company.