I got a copy of "Red Baron" for Christmas 2009. Despite all the historical inaccuracies (no-man's land in a pastoral field of ripe summer wheat?

The "fortress" on the Siegfried Stellung

), I have to confess I enjoyed it. The flying sequences were great (if short), and I thought the trench scenes were quite well done. I've watched it since with my wife and she enjoyed the love scenes with the lass from "Teminator: Sarah Connor Chronicles", so we were both sort of happy.
"Passendaele" is sort of from the same stable as "Red Baron". There's a great scene at the end of a trench assault in the Flanders mud, and I really enjoyed the Canadian setting but that's about it. There are a couple of laughable historical co-incidences, but on the whole there are worse ways to spend a couple of hours in my eyes.
Neither of them are anywhere near the same league as "Paths of Glory", "Blue Max", or watching the old BBC 1960s series "The Great War", however.