Have been using DNN for our clients since V3 and am managing over 40 sites with DNN. Easy Container is extremely useful as an integral tool of any site... so far it has worked with all of my skins. I initially purchased a single license then upgraded to enterprise. Support has been quick as well.
I've been waiting for about an hour now for their license keys (2 are needed apparently).. and no luck.. no email nothing..... i sent help desk request from snowcovered AND their site without luck.... the licensing key is a good idea if the distribution is automatic and instant... this is a very bad way to treat customers.
So far the module is not functioning. I initially received notice the minimum requirements were not complete but they couldn't help me until after they got back from some user group weekend or such. Here it is, the next Thursday with no response although I have reached out to them.
Initial support was lacking but I understand his wife had just had a baby.. so congrats.... Since then response has been good although there are a few bugs the seller has provided prompt support. I do believe, although, that if one chooses to sell their products through snowcovered they should monitor snowcovered helpdesk.