Not the cheapest it has been but not bad if you need a somewhat decent phone with amaysim 2 year warranty.
HTC U Ultra key features:
Glass back with a "liquid surface"
5.7" Super LCD5 with 1,440 x 2,560px resolution (513ppi)
2.05" secondary screen with 1,040 x 160px resolution (Always on)
Snapdragon 820 chipset - 4x Kryo (at 2.15GHz/1.6GHz), Adreno 530; 4GB of RAM
Android 7.0 Nougat with HTC Sense UI and Sense Companion
12MP main camera, f/1.8, OIS, Laser and Phase detection AF, dual-LED flash
2160p and 1080p videos at 30fps; 360° sound or High-Res audio (24-bit FLAC)
64GB storage, microSD slot (hybrid dual-SIM slot); 128GB version available later
LTE Cat. 11 - 600/50Mbps; Wi-Fi a/b/g/n/ac, Bluetooth 4.2, NFC, USB-C (USB 3.0, DisplayPort)
3,000mAh battery (sealed)
The HTC 10 was a lot better in my opinion and happened to be $100 less.
HTC have made a whole lot of great devices recently, but I don't think this is one of them.