Mike,
I have no personal experience with that particular scroll saw, but I do own several Proxxon table top machines, including the bandsaw and the wood turning micro lathe. My scroll saw is a Dremel, which, alas!, is probably the tool purchase I most regret, as I do not like it very much (clumsy and heavy, difficult to set blade tension properly, pass length on the smallish side).
I have, on the other hand, been happy with my Proxxon tools. The quality is perhaps not Rolls Royce level, but they do what it says on the box with sufficient precision, and are sturdy enough for their size. To the extent that they have limitations, these I have found stem mainly from just that: the small size, which is logical enough, I'd say, and anyway, should not really matter when it comes to the scroll saw, which is more or less standard size for that type of tool.
Were I to replace my Dremel scrolll saw (which will happen one of these days), I would of corse aspire to a true Rolls Royce of a scroll saw, namely a Hegner (**LINK**), but given that one of those babys will set you back nearly a grand … I don't think so, I'm afraid, and I would at least take a serious look at the Proxxon machine.