Several years ago I saw a halfbike and fell in love with it from very first look. It took around 3 years to meet it though (due to its cost).
It is even more exciting to ride it then I expected. It is faster then I expected (average speed is around 21 km/h for me). I live in Vilnius is nor too flat nor too hilly, but the range of speed the hub covers is perfect. It is very compact and fits well in tailored bag.
It is important to note that good ground is important to ride halfbike, thus mountain biking, downhill rides or trips though wild growth are pretty much impossible. Another possible issue is maintenance of it. Since it contains a lot of nonstandard components, it can be difficult to fix it in local bicycle stores. The company provides guarantee for 1 year, but I am not really happy with prospects of fixing it afterwards.
I bought all available accessories.
See by light set - very happy with functionality, mounting and strength of it.
Fenders - quite useless, the design is nice to look, but functionality is missing. A lot of water is splashed straight to the heels. Front fenders tend to fall off.
Halfbike bag - product is nice, but for the price it cost I missed an option to bring it in some comfortable way while cycling. Now I cant really comfortably bring it and ride a halfbike.
Liquid sealant - didn`t have any holes in tires so I guess it works.
Reflectors - they are fine, mounting felt weird though.
Overall, I am happy with product and very excited to ride it. Even though it is not the most effective way of transportation, joy more than compensates that. I would not recommend other accessories than light set though.