It really depends on how you want to use it. If you just want more accurate representations, probably not worth the investment in time.
If you fully detail your tubing, piping, electrical harness, schematics and such, and make full use, you would likely benefit.
RSD (routed systems designer) has a big learning curve and a lot of setup time involved. I've personally used the piping/tubing routing and find it easy to use but all the pre setup was already done.
I've never used the electrical side of it. The users are usually much more specialized and the contractors (engineers and designers) who do it typically command a higher rate that your average creo users.
