Is this a game worth buying? How long is game play on average?
I rather enjoy this one. Most games were under three hours (it is some time since I've had opportunity to play.) It feels like it plays fast as one players moves his units of a particular type and then the other player moves those type units. So you don't have those long stretches of waiting for your opponent to do something.
As Wittmann points out the combat is a bit different. It is similar to Bulge in that units add a number of die to an attack pool but there isn't a "hits that go to waste aspect" to it. It has reinforcement points instead of set charts like BOTB and D-day. Rulebook in PDF format.