So I finally got a decent amount of time outside on the Viper so I thought I would write a full review. For reference, I rode a Plasma premium the last two years. I purchased a medium frameset and built it up with the following specs:
Frame: 2016 Ceepo Viper- medium
Cockpit: Zipp Vuka bull, Zipp alumina risers & pads, Bontrager ski bend extensions
Brakes: Shimano Direct Mount Ultegra rear and Dura Ace front with Bontrager XXX levers
Drivetrain: Sram red
Crank: FSA BB386 evo SLK-lgiht 53/39
BB: Wheels manufacturing PF30
Pedals: Garmin Vector 2s
Saddle: ISM prologue
Hydration: Gorilla cage on cockpit & Enve cage on downtube
Wheels: Enve 6.7 clinchers
Building the bike up:
The bike comes bare frame with a parts box complete with stem, cable guides, toolbox, bento box, reversible seatpost, and “instructions”. The instructions are pretty poor, which was a disappointment since the bike is not sold in shops so its the only thing you have to figure out the build. On the plus side, Ceepo was quick to respond with questions. The bike is really designed well for Di2 with a Di2 junction mount under the stem cover and an easy to access battery compartment under the bottom bracket. However, if you are running mechanical there are some odd bends the affect the front shifting a bit (you will need an in-line barrel adjuster to get the correct cable tension). Other than the weird bends the build was pretty simple for a superbike and should be easy to travel with. The stem is a single position stem and comes in either 75mm or 100mm and is pretty easy to install once the headset preload is set correctly. The fork comes uncut which was annoying as the stem only has one position. The only other annoying thing is the fork is cut in such a way that limits the brake choice… no Omega X for me 
The BB is a BB386 evo which is a great BB standard but does limit the crank choice if you dont want to use reducers or adapters. Overall the finish quality of the frame is great and feels solid.
Fitting the bike:
I had my coordinates from my Plasma so replicated them on the Viper. The Viper is longer and lower (reach and stack) than the Plasma which was good as I wanted to get a touch lower so was able to keep my cockpit built the same and could just move more forward over the BB to compensate for the longer reach. There is a decent fit range on it since the seatpost is reversible (77/79 degrees) and you can pick any cockpit you want. The seatpost clamp is a single bolt design and I needed to use carbon paste on it to get the rails from sliding as the cradles dont lock them in as well as other posts I have used. All in all my position is a little more aggressive and more forward than my Plasma, which is just what I wanted to achieve.
The ride:
This is where the bike shines- it rides really well. It is stable, stiff in the right places, and handles very well. It is by far the best handling TT bike I have been on and the weight distribution feels well balanced. I have done a few short climbs on it as well and detected no flew from the BB or chainstay area. I’ve ridden it in some pretty windy conditions with the Enve wheels as well and it held the line well with limited nudging (I am 150 lbs for reference). Braking has been solid which is expected with shimano brakes and shifting has been okay. Rear shifting is great but as noted earlier front shifting is okay due to the odd bend in the cable to the FD.
Overall it is a great bike and was a good choice for me this year. It is well designed and while it may not be the fastest frame out there on the market (who really knows what it though) it rides well and has a nice fit range. Plus is looks unique as hardly anyone else has one.
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