What would be interesting to see, would be a properly tuned TTS system bike on a dyno chart, then a Rev Perf. EMS installed on the same bike with its dyno run, and seeing a comparison of the two on the same chart, HP, TQ & air fuel. If the lines are very close to each other, I'd be sold on the EMS because of the flexibility of modifying without needing a new tune every change. However, it sounds like some riders are reporting some stumbling at times on the EMS, and your hands are tied to a certain extent to fix that, where a tune with TTS can usually work out all the bugs with enough time.
For what it may be worth I was able to do dyno comparisons on the same dyno. Admittedly the runs were quite some time distant from each other. So differences in use of the dyno wheel and a variety of other factors could all be asserted. But it was at least the same bike on the same dyno with no other bike-specific differences than the installation of the EMS package.
Numbers were comparable. Though I had what was always felt to be a "good tune" before I didn't lose anything with the EMS installation. Comparing the AFR lines may not be the best comparison as most tuners tune to a flat AFR. If that line stays flat we call it good and move on. This package's load response intends to move that line relative load and requirements of the riding condition at the moment. Strictly for comparison's sake these are the before and after numbers I had about two tanks full after my installation.
There have been some glitches with the EMS unit. No one with any sense has said anything other than that it's still a very new product. As a cohort we're small. Not much of a sample size; especially when considering that most of the attention (at least here) has happened prior to the beginning of the riding season.
The company has seemed to respond to the glitches directly and quickly. One can only assume they'll get better too as their experience base grows. It's not an uncomplicated software they're working with after all. So whether it's a little time dialing in a TTS install, which needs to be done every time, or what has been only the occasional glitch with the EMS package needing some time it seems this package still has promise.
I, and others I've spoken to, all look forward to this spring, summer and fall as a larger test bed for our group. To see how the units perform and hold up under larger service. It's nice to be optimistic; and I am. But the proof of the pudding is in the eating. Or in our case in the riding.
So long as the company continues to be as easy to work with as they have been to date, as forthright as they've proven to be when questions arise and the product shows the promise/effectiveness it has so far it is easy to be optimistic. So bring on the summer, and the pudding.