If you were thinking on purchasing one of the new BLI Sound Equipted F3 or F7 locomotives, I would heartily recommend you head over to www.spookshow.net and read the review there. He found numerous errors in the units and gave them an "F for Epic Fail". Basically they look to be very expensive junk. If someone has had a positive experience with them it would be interesting to hear but it does not sound likely. I just cancelled my order for them based on the review.