If you can, get the bigger machine. Other than that, I've had few maintenance problems, and the machine has been a trooper.
The only gripe I have is that the Versacamm is a little bit slow, but it comes down to the right tool for the right job.
Short run of contour cut stickers? Fantastic. 100 bumper stickers? Fantastic. 10 real estate signs? Fantastic. 4'x8' banner? Fantastic.
Custom wallpaper for an 8' x 50' wall? Wrap for a Semi-trailer? You'll be printing for 6-8 hours, thinking about that Mimaki that prints 500 sq ft an hour, or that VuTek that prints 1000 sq ft per hour.
Or never taking on a really large project again. Which you will progress into doing naturally over time.
Good luck!