Well, there it is.
If I were going with a star rating, I'd do it thusly:
As a film: 5/10
It's alright, but not great. Good acting, decent production values.
As a Robert E. Howard adaptation: 3/10
Kane at least comes from Devon, sailed with Drake, is a swordsman with black hair and light eyes, so he fits the phenotype. James Purefoy as Solomon Kane (other coast) was awesome, and showed sparks of the real Kane. Robert E. Howard is the second name seen on the credits, which is awesome. All that's enough for three points. This is unprecedented, since I'd give the other four REH films 0/10.
As an action flick: 6/10
A lot of "badass" moments, great action choreography, plus the usual Rocky-esque "beat him down so it's cathartic when he starts kickin' ass" routine. The Overlord's entrance for the final battle is almost ludicrously awesome, like the gates of Hell just opened up.
As a Sword-and-Sorcery film: 8/10
I have no stock for nostalgia: this is better than just about all the other Sword-and-Sorcery films I've seen.
So, yeah. I didn't hate it. Maybe it's because I went in expecting Kull the Conqueror, and so was pleasantly surprised. Who knows, maybe there's hope for REH in the cinema after all.