I've put some miles on my Hygge Model S, and here are my general thoughts:
Pros
Paint Job: The paint job is superb. While I think purple on blue would look better, it's hard to fault it at this price point. However, the paint scratches easily, so be careful during the build process.
Delivery and Packaging: It arrived in about two weeks from China in a small box but was packaged well.
Value for Money: The bike offers incredible value for money. With the seatpost, bars, frame, and accessories all for around £550 delivered, it's hard to fault.
Ride Feel: The ride feel is subjective, but it feels planted and solid. I'm using Elite Edge 65mm wheels. While it’s not the quickest to get up to speed, it cruises better than my old SuperSix Evo. It’s a budget build, so there’s no power meter, but it seems quicker, possibly due to my extra effort to prove the aero benefits.
Attention-Grabbing: It turns heads and I’ve been able to outpace riders on bikes that cost five times as much.
General Comments
Handlebar: The handlebar is plenty stiff. Someone in the comments mentioned theirs was flexy, but I haven't experienced that.
Headset and Seatpost: I didn’t have any issues with the headset or seatpost slipping.
Cons
Cable Routing: The cable routing wasn’t easy. The handlebar has many sharp edges and limited space, making it a real challenge to get right.
Fork and Rear Triangle: The fork and rear triangle need to be stiffer. I don’t know if Hygge did this to help with compliance, but it’s not very confidence-inspiring. Adding some more carbon in these areas, even for the sake of 100g, would be beneficial.
Lack of EPS Molding: The down tube and top tube are pretty creased, although the headtube isn’t too bad. EPS molding would be a nice touch.
The total cost for the build was around £1250. The Elite wheels took 65 days to arrive, but I took advantage of Choice Day and got them for £365 delivered. The R9 shifters, which were £35, work well with Ultegra 8100. The only downside is the thumb shifters, which make it impossible to shift on the drops.