For our needs, yes. They run on cloud VMs so there will be a markup but their startup-4 and higher plans on GCP use local NVME SSDs so we get much better performance for the price.
We also make use of cross-regional replicas and are looking at doing it across clouds so if you want that then there isn't any other option other than doing it yourself. It's more of the complexity of this deployment rather than raw db size for us so if you have several TBs then maybe it's not the best fit.
