No experience with those rims, but SJS Cycles in the UK carry them and SJS won't carry stuff that doesn't work properly.
https://www.sjscycles.co.uk/rims-tape/ryde-zac-421-275-584-rim-black-36-hole/?geoc=CA
A couple of points - the rims are a little on the heavier side and I believe only come in 36hole drilling. These are probably considered eBike rims.
If you send SJS an email inquiring about their experiences with the rims, they will probably give you their honest opinion.
Where are you located? I'm tempted to grab a pair of these, but being shipping to Canada would be costly, unless there's a local supplier.
IanA Alberta Canada