Had one for six months and……..
Brilliant concept
Build quality is very good
Price okayish
Ability to swap between different bikes awsome.
Its slightly long for one of my bikes which makes getting an inch drop from top a pain in the butt with the delay thing, cured by going with 160 cranks which also resolved a creaking issue so all good.
The delay in the operation is not an issue except as described above.
Remote is OK, cant see it falling off unless I crash, does rotate a bit with use.
Charging frequency pretty good, maybe once every couple of months, must take care to ensure rubber seal is located securely.
Downside, first one stopped charging after a few months, this was during the summer with use on only dry rides so not water damage.
Refund from wiggle after 3 weeks, needed to go back to magura for assessment. Happy enough with function to buy a replacement.
Hope this helps :-)