I've been considering one of these for awhile. I like the size and detail and the fact that they are TMCC controlled. Great for my small switching layout. My fear is the fact that the rollers are only 3" apart. This leads me to think that they don't navigate switches or a combination of switches well. For those of you that have one, how well do they handle passing over switches and switching chores ?
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My experience with "critters" in general is they run over switches very decently most of the time. Normal... 'just another 0-4-0" or single roller set diesel engine 
I have more issues from crappy common rail contact on antiderail turnout's curves when there are traction tires than roller gap issues. Mine vary from about 2¼, 2¾, 3, 3¼". None have to "rammed" to pass thru unless the track ,or rollers or wheels are dirty or I'm too near stall and the anti-derail triggering stalls me.
Thanks for the info!
My TrackMobile operates well on FasTrack O48 switches and manages to negotiate O16 SuperStreets curves.
I can say that the TrackMobile handles O36 and O72 Fastrack switches without any issue for me.
I have a good mix of Atlas 054, 072, WYE, and #5 switches and it works fine. Only problem is a 054/072 curved switch.
Gee, that Atlas O72/O54 curved switch gives a lot of locomotives issues, if it's not dropping power, it's derailing them. We have one on a corner on our modular club layout, I'd like to dynamite that stinkin' thing! 
John,
Two things I do which gives me good reliability with the curved switch is:
1. I tweek the pick up rollers so they are close to being perpendicular to the top of the rail. I’ve found them to be twisted one way or another out of the box.
2. I installed a 2” piece of rail on top of the ties centered between where the center rails split as in the picture below. This helps keep the rollers from dropping in and snagging which derails the locomotive every time!
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