It wasn't that bad actually. Lust (and pretty much everything) was pretty spot on for squeezing 40 episodes into about 2 hours. I mean it had its flaws, but it was a pretty faithful adaption, I personally enjoyed it. The woman who played Lust did a great job, I was impressed.
I only watched the first 15 mins with my partner. We're both huge fãs of the series so the first impression was lackluster. It's not bad enough for me to ditch entirely, I'll go back and watch the rest sometime.