Oh yeah i always get off brand replacements. Their only disadvantage is that you dont get automatic reminders to replace the head, but i dont mind.
Aside from that its pretty crazy, that the original ones have a nfc chip (i think) on them to enable these notifications - something that is absolutely insane on a prduct you throw away regularly in my opinion.
I have read abput reliability concerns, especially with the cheaper models. However for myself i have only had issues in my family once out of four times and i was able to fix it by opening it up and tightening a screw that held the head…
Amazing! Looking forqard to see how it goes :D