I’ve got the slightly smaller 300E. Not bad (now) but I’m not sure I’d by one again given the alternatives. I got a large discount when I bought mine as it was a shop display model.
The injection moulded table insert on mine wasn’t flat and too thin anyway so went straight in the bin. I made a new one from a piece of polycarbonate and it’s still on there ten years later.
The blade tensioner is hard on the hands so I fitted a thrust washer and replaced the knob with a crank handle and it’s very much better.
The blade guides where somewhat noisy in use on mine. They were difficult to adjust accurately and somewhat bulky. RP stopped using this design on new models some years ago. I replaced them on mine with home made guides that look very similar to the new ones RP now fit.
Some of these points have been noted by many others before so it’s not just my machine which now works well with the new parts. The blade supplied, also as mentioned by others was rubbish. But obviously easily replaced.
Good luck with the new machine.