I had been contemplating getting the SS scroll saw (there are a few listed each month on Craigslist WAY below retail price), but after doing much searching I've found too many weaknesses (my opinion).
The variable speed really needs to be close to the arm because you will use it more than you think. (And you DO want variable speed!)
A built in light is essential and even more so with old eyes like mine. Most scroll saws in the 500 range come with built in lights and everything SS has. yes you can add a light but then that is just one more thing to carry with you when you set it up
A pedal on/off switch can be set up using SS's accessory but it is an addition (37) when other brands include it (or it's part of a package and usually less expensive).
Standing is NOT conducive to enjoying working on a scroll saw and with the table set as high as it is (for standing), you will get tired more quickly. Much of the use is hunched / bent over following tiny lines - note -- a large magnifying glass becomes as essential as the blades. But the biggest pain in the back is bent over. (Check out the second listing)
With most separate systems you can place it on custom length legs, or on a table top with shorter legs and use a very comfortable chair to sit in. An old small desk with the legs trimmed so that your table is about 6 inches below chest height when sitting down is excellent!
For that same $700 you can get a VERY nice stand alone machine with momentary pedal, quick change for both style blades (pin and slot), good light and a strong system to blow away saw dust (really a big thing unless you want to huff and puff all the time you are guiding a piece). If you can rub your tummy and pat your head at the same time then feeding the work and blowing should be simple but for some of us...
As much as I want SS to sell lots and lots of extras so they can keep a healthy bank account, I have to say that unless you really want a scroll saw with the SS logo on it, you are light years ahead to get a different one.
Not recommending this brand (though it is decent) here a couple examples (they just both happen to be the same brand)
http://spokane.craigslist.org/tls/3258858726.html
more than 700 but loaded with stuff
http://spokane.craigslist.org/tls/3321273479.html
f you are uncertain if you really want to get into using the scroll saw then you might buy a used one. Most of the lightly used SS scroll saws I looked at were less than $300 and one was $125.
That's just my opinion. Don't mean to dissuade you from buying from the big red circle

(heck I could give them thousands more and still have a want list), but just another path to consider.
Ben