You sound like one of those infomercial pitchman
.
I'm using mechanical brakes on my Tekno revo and motor brakes on my ST RR. I like the feel of the motor brakes better than the mechanical brakes. I think it's just a matter of getting used to. I never really cared much about my runtimes but I do use the same batteries between the two trucks.
Now as for TeknoRC's elektri-crap, I took it off due to temp problems. After I was able to lower the temps (by running it without springs), I never liked it because it seems to be more unpredictable compared to using a pinion.
Bottom line, use whatever works best for your application. What might work for you might not for another. Opinions and facts are all part of a dicussion and marketing but in the end, it's still up to the end-user to make the final decision.
By the way, I used to run nitro trucks only until I started converting my trucks to brushless 10 months ago. Based on this, I can only speak about my personal experience using mechanical and motor brakes.