The Smart VPS Service is fast and was built to my customised specification.
They moved my Magento website over without any problems and didn't charge me to help.
I have tested several VPS services this year and Smart is by far the fastest.
I also use PINGDOM to monitor the VPS uptime and over the past 4 months this has showed no downtime which again is rare based on my experiences with other VPS servers i have used.
I would personally recommend them to anyone looking for a reliable and fast VPS service in the UK.