I know this is an old thread but here goes. If you look closely at the specs, you will see that they only offer 99% uptime guarantee. This is far too low for any serious business level hosting. We offer our web design clients enterprise level hosting and 99% means that their web site would be offline for 3.5 full days per year or nearly one third of a day per month.
Most other hosts offer 99.5% or 99.9% if you do the math correctly 99.9% has 10 time less down time at only .35 days of down time per year.
If hertzner or senapi changed that to 99.9 and delivered even close to that I would move all my servers to them. Since their price is good.
I tried softlayer and ukservers.com and both give me reliability.