I have been using Raid Host for a couple of years now and have been impressed all the way.
When I transferred my site and emails to them they were highly professional, ensured minimum down time and provided excellent service during the process.
Over the last few years I have had next to no issues. There have been a couple of times where I needed their technical support but this is mainly due to my end user mistakes. On all occasions service has been fantastic with all issues to date resolved within 30 minutes regardless what time or day I contact them (including outside general business hours).
I won't be leaving Raid Host any time in the future and would strongly recommend them to anyone, regardless of your requirements due to their high standards of quality service and value for money!