I used synergis adept 7 years. they have good custom services and tech support. they usually reply your email the day after and give you a call. it runs well on Autocad. For Autodesk inventor, there is few issues. But i see it improved a lot in these years. Be aware of ipart and ipart libraries setup, you'd better talking with synergies tech, and let them guide you thru process. Good Luck!
Autodesk Inventor Professional 2019