I have been using 123-reg to host domain names for several years and have only good things to say. I have also recently purchased a VPS and an SSL certificate from them, both have been great.
Since I first started using 123-reg I have been doing a Computer Science degree so I have been doing my fair share of advanced DNS configuration as well as setting up and securing my new 123-reg VPS.
123-reg today also updated their reverse DNS record on one of my domain names to my new hostname on my VPS which I have also purchased through 123-reg in order to stop my emails being sent to spam folders. This was brilliant and means I can continue to use my new hostname.
I have recently switched VPS from Webfusion (their parent company) to 123-reg to take advantage of CentOS6 and cPanel at a great price. It's hosted in England which means low latency and support during working hours. Both VPS's are in the same location and uptime has been very good with only 2 small blips.
Whenever I have had any support queries I have had a clear response that has answered the question straight away.
Their abuse department also looked through some evidence of portscanning.
All in all a great experience so far.
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