Just perfect. There's one point about it. The rack relies on a system of velcro ties. If you put heavy panniers on it, the rack tends to get... well... skewed (bear in mind English is only my second language). My brother (who presently owns the Trance E+) fixed that by applying very strong glue, and attached the TetraRack permanently to his e-bike. No issues for many months now.
P.S.
@steve mercier uses the TetraRack on his FS Moustache as well.