I've had my C50 for a little over a year. Compared to my previous bike...
Yeah, removing the gas tank to do a simple plug change is an annoyance.
On the other hand, the shaft drive compensates for it. Not having to do the simple but constant maintenance of a chain is a blessing.
The 5 gear thing doesn't bother me at all. My Honda VLX had only 4.
The majority of my riding is on the superslabs and I don't find anything annoying about the engine revs or buzzing. Maybe because I'm used to it.
Anyway, it doesn't seem to bother the bike...They're designed for it.
I don't think it's a beginner bike. I'm hardly a beginner, and I chose one.
I don't think any
bike is a beginner bike. Choose the bike you like.
There are beginning riders, though. If they get the most powerful bike in the world, they'll still be beginners until they are not.
It's a fun ride. Be safe. Enjoy. Don't ride out of your personal comfort zone.
I'd highly recommend taking the local motorcycle safety course as soon as possible. Also, pick up a copy of Hough's "Proficient Motorcycling"
Read it, Learn it, Live it.