Just as a suggestion --
You might consider trying to contact a company's support dept. before you talk presales with the company. Even if it is unmanaged, do some research on the company here and around the 'net.
I tend to do this when i'm looking for a prospective provider, and let me say, it definitely helps in avoiding getting burned. I usually disguise it as something a realistic support query might be.
That way, you can get a feel for what their support is like -- not just their support reply times.
It might seem a little underhanded to do, so it's definitely your prerogative, especially since it might take a few minutes away from a legit support request for that company. So, it's really a matter of choice -- but in my opinion, it's somewhat justified since a good company will want to take care of their customers -- even if they're not their customers yet. It's an interesting conundrum to think about
Again, good luck