Had my first ever ride on Derren Brown's Ghost Train yesterday after trying to avoid all spoilers and I must admit, I really enjoyed it. I loved the pre-show and thought that it really set the scene for the rest of the ride. I didn't have any issues with the first VR section and I thought the live action section was really well executed. The second VR bit was my least favourite part of the ride but I still enjoyed it, despite it feeling a bit out of place with the rest of the attraction.
Looking through this forum it looks like I was lucky. My VR wasn't glitchy, the audio was clear with both sides of the headphones working and I was only on the 'green mist' section for about a minute. I think TP have a great attraction here. There are a few issues that need to be ironed out (some of the VR headsets not working, audio issues, throughput, etc) but I'm hoping they will be fixed during the off season.