This is very mediocre for a Drizzt book. R.A. Salvatore is completely changing up the formula that the old fans originally fell in love with. The Neverwinter series was a huge disaster and things were supposed to get better after that. The Companions was amazing and it seemed like the series was going to go back to the way it used to be. But this book is taking two steps backward.
First of all, Drizzt is not the main focus of the story. While the companions are interesting, they're not supposed to be the main focus. Fans fell in love with Salvatore's old books because they were all about Drizzt, and fans liked the character, not the companions. In addition there are way too many pointless side characters. Some dwarf king dude, Gromph, Quenthel, Methil, Jarlaxle, about a dozen other dark elves, and the stupidest side characters of all: Tos'Un and his daughter. 90% of these character don't impact the plot at all, especially in any way that effects Drizzt directly. It seems R.A. Salvatore wants to write about political machinations and world conflicts rather than right a personal adventure story centered on a few people. It's as if he just shoehorned Drizzt in so people would read it. And trust me, it doesn't stand on it's own.
Secondly, the character's don't even act the same anymore. Especially Drizzt. He used to be a badass renegade who was daring, passionate, reckless, independant. Now he acts more reserved, careful, calm, emotionless, etc. It's as if he's not even the same character anymore.
Third, Drizzt and his companions seem to be reduced to about 5th level adventurers. Drizzt used to be the equivalent of a 20th level or so ranger. He used to solo dragons, giant's demons, etc. But now he and his friends almost get killed by a few paltry orcs and one ogre. It's an absolute disgrace to the characters.