I'm posting this here, because it had to do with S gauge, but it probably applies to any scale.
In early December I placed an order with Nicholas Smith Trains for some Gargraves track. The website photo showed flex track, which is what I wanted, so I asked for (6) sections.
After a few weeks, I emailed them, just as a follow up; within a day or two I received a phone call, apologizing for this order which had "fallen through the cracks": He also wanted to double-check to make sure it was S gauge I wanted, not O gauge. #1: 
The items arrived, but right away I noticed the box looked too short to hold flex track; sure enough, inside were 6 pieces of their 42" sectional track. 
I sent another email, and the next day got a call back. I was told that after the first of the year I'll be getting another follow up call, to decide what will be the best course of action: #2
I had wanted some flex track to be able to make some larger radius curves: the track I received is the same diameter (42") as original American Flyer track, so I felt I hadn't accomplished much. However, I thought I'd open the box and try it, just for laughs. Since I got 6 pieces, and you need 8 for a complete loop, I had to flesh out the remainder with AF sectional.
Holy Cow! Not only does it look better, but (as was mentioned in a previous thread about this brand) the usual sparking from the tender and caboose wheels are a thing of the past. I dunno what it is about this track that eliminates that sparking, but there is none. I just might end up ordering the additional 2 pieces I'd need to complete the loop, and call it good. 
So kudos to Nicholas Smith for great service, and Gargraves for a great product: #3
Mark in Oregon
