We've used a few different makes. Currently, our vinyl cutting and pattern plotting is done with Graphtec models. We used Allan Datagraph stuff for awhile, but had some repeated problems with them. Gerber's stuff is pretty decent (but pricey). Our studio had a Signmaker 4B plotter for a long time; it was sold a few years ago to a cemetary headstone maker. We also had a larger, old Gerber S750 that I wanted to throw out a window whenever I had to use it. It really stank at drawing
paper patterns.
Plotters can still have their problems these days. But with how much more powerful computing technology has become, most new plotters can handle what's thrown at them much better.
That doesn't get you past some of the physical problems. Huge
paper install patterns (for things like routed building letters and graphics) can still be a pain to produce. If my artwork requires the plotter to draw something like a horizontal rectangle over 10 feet in length, I'll often break up the path into several smaller line segments to force the plotter to draw all the artwork from left to right. You risk mashing up your pattern
paper if the plotter is having to go back and forth across long lengths of
paper to draw objects.