I was rather pleased with the Ruins of Myth Drannor product, mostly because it had a lot of information about the elves (which is my favorite race), and gave a lot of background information of their lives before their retreat to Evermeet. The downfall of the product would be that any low level adventurers would find this product too challenging and too mind boggling to play. This is not just like any dungeon above ground setting. It is one of the only settings where you can encounter baatezu and tan'ari. Heck, if your DM is familiar with various Forgotten Realms novels, you just might encounter the "Knights of Myth Drannor", allies of Elminster.

This product does feature some good monsters (like Baelnorn - undead elves), and has more than one adventure, all done well.