Are budget Chinese bike computers (CYCPLUS, iGPSPORT, COOSPO) actually usable?

Reddit threads in r/cycling and budget-focused subs report that units like the CYCPLUS M1, iGPSPORT BSC200S, and COOSPO CS600 handle basic speed/distance/sensor pairing reliably, and the higher-end ones now include color maps and route navigation. The trade-offs reviewers flag: slower GPS acquisition, less polished apps, and weaker structured-training integration compared to Garmin or Wahoo.