ROAM fractionally speeds up benchtests like MacBench. There are just some aspects you cannot test other than just by using the machine. DriverServicesLib errors are gone. RAM requirements are a lot lower than initial versions. Some machines that were made slower by ROAM in early versions, should not be drastically slower anymore.
Some incompatible machines are now compatible.
NuBus Macs still are not, but might be in the future. Please do not link to actual files you can download. If you have any questions or comments, feel free to mail me. I noticed there is a ROAM Compatibility page posted as well. I haven't run any benchmark programs, but my Mac feels snappier.