I agree with the above. I now have 7 Williams F3s, 2 Williams F7s with Ott sound systems, and a GP7. All run quite well. The Willams F3s are the Lionel look alikes, but I think they actually look better because all of the units have front hand rails, portholes, and grills on the roofs. My GP7 has a problem with its horn, but it doesn't worry me at all. I also enjoy several Williams brass steam locomotives even though they have no sound.
Lew