It's really interesting to hear some difference of opinions here.
Personally I love it. The FFB is awesome and the track surface is unrivaled in anything else I've tried (LFS, rFactor, nKp, etc.)
LFS feels very static and dead now that I'm used to iRacing. Of course each has it's merits but in iRacing I feel more connected to the car and subsequently the road than any other sim, bar none. In iRacing the car actually feels like it is on the ground, like it has some weight to it. LFS feels like the car is floating right above the ground.
iRacing still has a long way to go before it can rival the features of LFS, but the interaction between the driver, vehicle and the track is way better in iRacing IMO. This coming from someone who this time last year swore that LFS was the end all of sims.