I have had Atlas O track for about 10 years now. I have NEVER had "dead spots" nor has it ever been "temperamental." When I installed it, I placed one track at a time and ran an engine each time I had installed a few pieces to make sure I had installed it correctly.
The two switches I use have never given me a problem either.
Atlas O reminds me a great deal of the Lionel Super O track that I had back in 1957!
Any brand of track is nothing more than a conductor of electricity*. Installed properly and connected correctly, it should be trouble free. I cannot imagine a "dead spot" in a length of nickel silver, which is a better than average conductor of electricity!
I was first attracted to Atlas O by a layout in my LHS. With Atlas track ballasted, I had never before seen more realistic O Gauge model train track. Ties appeared to be the correct size and length and had the correct spacing. The rails were solid and "T" shaped. And, unlike other track, it was not a matter of silver rail on black ties. it was duller, more realistic nickel silver rails on brown ties!
In the case of this LHS, some slight dust had collected in the "grain" of the ties, adding to the realism.
Overall, I have been very pleased with Atlas track!
John Knapp
Erie, not Eerie
*Assuming it is gauged properly, etc.