I've used both genuine and aftermarket Toner for the Lasers and the same for the Label printers without issue.
For label printers, avoid Dymo like the plague. They stopped Linux support and now include bidirectional RFID chips in their label spools to lock out after-market supplies. The remaining label count is decremented on the chip as you print.
I need to replace my printer and will go with a laser, but I've been getting such mixed signals about various brands that I have no idea which one would be acceptable. I'd love to hear that Brother is an acceptable one.
I didn't have any other objections to the printer, for what it's worth.
The label printers are 5+ year old QL-500 (x 3) and a ~3 month old QL-810W (x 2 at he office). I really hope they're not taking the DRM route for future models!
[1] https://www.inkstation.com.au/brother-mfcl3760cdw-toner-cart...