If I were to build a perfect ebike it would have the best, proven industry components like a German-made motor and an LG battery. I would go with the Enviolo and carbon fiber drive system and never have to bother with greasy chains and touchy derailleurs ever again. I would opt for air shocks over springs, ride it on Kenda tires and keep it simple stupid with a controller that does not require a degree in computer programming to operate. I would have the frame built and components assembled in Taiwan where most of the worlds bikes are made, where they know what they’re doing and opt for sizing and weight of the components to fit the geometry of the bike, not too big and not too small. Finally, I would offer an unheard-of 3 year warranty backed by exemplary and personalized customer service and sell it for way less than any other eBike in its class. It was hard to pull the trigger on a bike I’ve never test ridden. I have ridden countless eBikes and, after a single ride on my new Serius, have no regrets buying 2 of these.

I don't have one (yet) but my neighbor does and I've ridden it quite a bit. He likes to ride my Honda Ruckus, so we do a lot of lending back and forth.
It's a great e-bike with lots of positive things to say about it. I really do like it a lot. Love the mid drive motor, the Enviolo, the belt drive... But there is one downside that's holding me back from getting it and that's the very anemic battery it ships with.
We live in a fairly hilly area and it takes a lot of nursing to get 15 to 20 miles out of a full charge.
I see it has a newer battery available but it's still only 36v 14ah. In today's market I would think a 48v 14ah would be the absolute bare minimum, at least for me. Even then, I doubt I'll get one less that 48v 20ah.
So I'll just enjoying riding my neighbors and hope a not to distant future model has a more capable battery.

I actually bought a proxima which the no longer make, but I wanted to leave a review because this company is amazing. The bike is great. Rides well and is fun. But Vvolt is 100% customer focused. They will do everything possible to help you. I can't say enough about this company.

200 miles on the bike so far and really enjoying it. Have been using the bike for a combination of paved hills and dirt roads and love that it can perform comfortably on both.

Took a little time to dial it in - make sure to get the Xplova Ebike Assistant app which allows you to set how aggressive the motor assist kicks in. By default it is at 50%, so if you are underwhelmed by the assist, try increasing the setting first.

The Vvolt staff have been very helpful getting the bike optimized and respond quickly!

I've had my Sirius for a month now and am quite fond of it. First, I got it for the low maintenance/fast ebike combo, and find it meets these criteria nicely. I'm a 61 year old male riding 16 mile a day daily commuter in Boston, with bumpy roads and traverse the marathon heartbreak hills, so I like to get a break by using ebikes some days. Previously I've had a upper end Specialized Turbo and loved it, but for some flaws: chain rust, derailleur gumming up, and thinner tires without shocks. The first 2 took an extra hour cleaning each week, more in winter, the latter caused me to go airborne at 25 on asphalt -eek!
This has a wonderful comfortable air shock and 2.2' tires to prevent crashing on our poor roads,a sealed CVT shifter and belt drive to minimize cleanup.
Running half power, I'm often 12 to 22mph,vs 8 to 18 on my pedal only bikes, saving a bit of time and sweat, and think it would go about 25 miles at these power levels before needing a recharge. The transmission is smooth, the bike is smooth, the bumps don't hurt nor cause crashes. Its pedal assist is the only way to go for true pedaling, although throttles make sense for mini bike styled rides or budget constraints.
The Sirius is a complete, well thought out package, that should last years of fast, comfortable, safe usage with minimal upkeep.