Used it on my shelf layout. Tinplate, wood ties, black center rails. Used 54 sectionals in the turns and a few s-curves for a smooth flow. Straights I used the flex track. One section I did have to bend a piece. It doesnt bend easy, but again for me it was 3 rails. But eventually will do what you want it to do. 1st time I tried, I did kink it. But after some time, was able to remove the kink and make it back into good track.
Top and top middle is two 54 sectional pieces of track, Middle right is the long run with flex. Not perfect straight line, but train looks normal from below. Lower pic is me bending flex track going into wash room, then to other room. It took some time for me. Trying to get smoothest flow. It works just fine, but I dont like the look of my 70' passenger cars... Had to be made this way to go around studs and dryer wire. But this weekend, being redone to a nice straight section. And since its flex.. I can make it straight again.
I got some of their power track ties, but left a gap between the rails. So every 3 ft, just knocked off the black coating and soldered wire directly to rails. Nuff space to run wire under outer rail to buss wire without worry of track digging into wire to cause a short down the road. 
