MySQL, PHP and many other back end web services. Not only should this be more secure but it should also provide more reliable and faster web page rendering.
Although I had a few hang-ups, mainly e-mail related, most of the web sites I oversee are up and operational, including this one you're currently on! I may have to tweak a few things here and there during the week but overall my MySQL database moves went smooth (I was most worried about those).
Oh and I was pretty happy with the support from my server provider. The few times I ran into question, I was just a call away from getting some help.