I've had issues with torque tubes (vibes from shafts not being straight, stripped gears) from other munufacturers that have put me off of torque tubes.
Other manufacturers being the key words in that sentence. The Synergy TT setup is freaking sweet. I broke a rear landing strut in a hard auto on my E7 and couldn't see that I had done it from where I was standing. I spooled it back up to take off again and the tail blades were touching the ground. By the time I hit TH, the tail blades were pretty much ground in half but none of the TT gears had any damage. Stripped TT gears just don't happen on the Synergy. I have broken front TT gears in hard crashes but I've never stripped one.
I'm also wary of kits that have just been released and having to do further beta testing as a consumer. I'm looking forward to building and flying a quality kit, but still want what has been tested and proven for a while.
Again, this just isn't the case with Synergy. Matt and the team pilots beat the crap out of the prototypes before any kits ever get released. In the case of the N5C TT version, you basically have the well proven N5C as a starting point with the addition of the also well proven TT and head designs that are common with the E5 and E7.
When the E5 first came out, last year, the pre-production builds that the team got went together and performed flawlessly. I was lucky enough to get one of those kits and it was the easiest and most straight-forward build I had done. That air frame also set a new personal best for me, at the time, of number of flights right out of the box before crashing (pilot error not part failure).