I thought this was an excellent module.
When I first played it, it was as a player. I thought the themes - the obvious Lovecraft inspiration - were rather well done. If you run the town right, it comes off as a really, really scary place. The townfolk are all acting weird, people are disappearing. This is stock horror movie stuff.
We brought Ramne with us, but, IIRC the final battle didn't feel like it was Ramne's win. He may have softened up the naga, but, he certainly didn't finish it off. Besides, the fight with the cleric and his pet wight was a bloody exciting event.
From a design point of view, we have an entire town, complete with lots of NPC's, none of which are so high level that they stick out (cough Homlet cough).
Orlane works as a base for campaigns very well, meaning that you can extend the life of the module far beyond the initial adventure.
I think it's pretty well done.