The machine is extremely good within its limitations - remembering that it is a small engraver, not a Miller.
First of all, the tables (and pantograph) are small, therefore limiting its capacity to something like 4mm scale frames, rather than decent sized O gauge frames. One would have to be very careful with positioning clamping bolts to maximise capacity, so they didn't interfere with the pantograph swing.
The pantograph also pivots up at the rear to give work clearance, rather that having a vertical parallel motion. This means you have to be careful setting the rear pivot height and the stylus height in order to get the pantograph action paralleled to the bed with the tool set at the correct height (which is random!). However, it doesn't take too long to adjust this correctly.
There is no noticeable play in the linkage, or in the tool support, which means that it reproduces accurately - indeed, the critical measurements I have taken have been within 0.1mm of my CAD drawings (via laser cutting MDF at 2x scale, and pantograph milling from the result.
I find it quite easy to break the 0.8mm D cutters if I'm not extremely careful but the slightly larger ones are much more resilient.
For me, it is a stunning compromise that gives me a very small machine, enabling very accurate production of parts which I would otherwise have to make by hand. A proper Taylor Hobsen would however be a much superior machine if one had the space.....
Being able to laser cut the templates is an incredible bonus to say the least.
The pantograph and drill come in at just under £250. D bits from EBay at a pound each