Never tried/used the Garmin/Rally, own PowerTap and Favero powermeter pedals.
How easy is to service/replace the bearings with the Rally pedals?
My PowerTap pedals need to be sent to SRAM in the USA (with stupid postage costs) to service the beearings.
The Favero Assioma are user serviceable and the bearings are readily available.
Expect to replace the bearings every 20,000km or so.