If you mean the Happiest Haunts Tour, I did go on that one last year while I was there for the Halloween Treat. It starts out at the Tower of Terror and ends up at the Haunted Mansion. I had heard some not so great reviews of a previous similar tour, and was a little hesitant to book it. But I also had read that they redid the script for the tour. It turns out though, I was still not impressed. It just was kind of flat and not very memorable. The best parts were getting to go on some rides with little wait, the cool light up necklace with key on the end, and the finish of the tour. I won't spoil the end for those who will go on it, but if the rest of the tour had been a little more imaginative like that, it probably would have been worth it. But as is, I wouldn't go on it again, or recommend it to anyone else. Not worth the money.
Chas