Of course, by posting on the EE forums you’re going to get somewhat of a bias. My take is this. Using a hosted solution like this locks you into a CMS and a hosting provider. This ties you very closely to one solution, but in this case its not even clear who that is since you’re dealing with a reseller.
If you go with EE and you don’t like 2.0 you can move to another system. You’d have access to everything, including the code and the database. In other words, control is your hands, not the hands of the reseller or whatever they happen to be reselling.
This is the great compromise of hosted solutions. You typically get faster setup at the cost of control. With “do it yourself” solutions like EE there is more up front but you get to choose your own tools. For example, are their metrics as good as Google Analytics or Mint? Is the commerce solution going to meet your needs? The answer might be yes, but if its not, you have no options, no choice.
What if they can’t handle traffic spikes? You can’t move to a provider that can, etc… You get the idea.