Not to say that they were extremely disposable on all my presale questions.
1 - with Cobalt you can create ABSOLUTELY anything
2 - their support is outstanding
3 - the technology they use is unbeatable
if you are a joomla pro webdesigner, using Cobalt will give yout the possibility to provide your clients with incredible features and create very complex websites.
It is absolutely worth the effort to spend a couple of weeks to learn everything Cobalt can do.