As a Google Android user using a Google Pixel and Google's RCS on Google Fi, the messaging system is a total clusterfuck. There's no way to reliably send or receive messages, and sometimes my images will be degraded silently, group messages to other Fi users often don't work before several retries, reactions are totally hit and miss...

IMessage is a much much much better experience. It's not at all bad for their customers. It's a huge plus of that system over Android and other platforms that still try to piggyback off SMS or haphazardly support RCS.