XOSS G+. Very minimalist, functional and lightweight.

All wireless, compatible with most Bluetooth and ANT+ sensors (not power meters, although XOSS says they're working on that). It works fine with my Wahoo Ticker in both Bluetooth and ANT+ modes, my older 2012 era ANT+ Wahoo speed/cadence sensors, and XOSS brand earth induction convertible speed/cadence sensors (both Bluetooth and ANT+, I think). This flexibility enables me to share the same sensors with my phones, since the phones will default to Bluetooth while the XOSS G+ defaults to ANT+.

Supposedly it's compatible with four of the major worldwide navigation systems (BeiDou, Galileo and GLONASS), although in the US it will always default to GPS. I'm not sure whether it automagically defaults to other systems if I leave the US, or whether there's a firmware update or some other method to enable compatibility with other navigation options.

I bought two in January 2020 -- I planned to buy only one but they offered a second at half price so I snagged it the same week.

Works fine. Occasional minor glitches, usually fixed quickly by XOSS through updates to the firmware or app. Overall, no worse than the similar complaints I've seen from friends who use Garmin and Wahoo bike computers.

Usually the GPS trace is more accurate than my phones using Wahoo Fitness and Strava apps with the phones set to GPS only. Usually I run the location "enhancement" option that can resort to cell tower signals, Wi-Fi, Bluetooth, etc., to improve accuracy. The XOSS G+ is GPS only, but is generally fine. If there are problems it's usually due to atmospheric disturbances or other stuff interfering with GPS signals.

It also works for my runs, although the G+ display isn't geared for running (no option to display pace, cadence, stride, etc.). But if I wanted to leave my phone home, the XOSS G+ is much smaller and lighter, displays and records my route, speed, distance, heart rate, even elevation, etc. And I can sync that G+ to Strava later, or save the data file for use with any other compatible software/utility.

But if you're worried about data privacy, particularly if you work in any job that demands security, I'd avoid the XOSS. It's based in China, all data goes through their servers, so the device could potentially be used to exploit security vulnerabilities. I'm retired, I don't care, so I use mine. But if I still worked for the military or government, I wouldn't use the XOSS.

So if that's a concern, stick with an app such as Cyclemeter (iOS or Android) or one of the Lezyne computers that does not offer any way to automagically wirelessly sync data -- I forget which model(s), but at least one Lezyne bike computer needs to be plugged in via USB cable to transfer ride data.