Got No Retreat! to the table and played one of the smaller scenarios, Fall Blau. Verdict...not sure. It seemed fiddly to me. Or, it just didn't quite click. This line, didn't click, is my standard answer for games that don't trip my trigger. I'm pretty reluctant to judge a game harshly because usually my non-clickishness is more about not being a game that interests me as opposed to it being poorly designed and executed.
So, this one will need another go, later, after I try a few more of the ones I've purchased for Geekway.
It may be one of those that just doesn't play well solo. After all, it's not designed with solo play in mind.