I love, love, love mine! I got the whole enchilada, machine, stitch regulator (seldom use, but nice to have on hand), table extensions, etc. I am absolutely enamored with HQ's extensive online tutorials for their long-arm quilters generally (stand-up and sit down have many things in common, notwithstanding that with stand-up you move the machine; with Sweet 16, you move the fabric). They have their short, 1-2 minute tips which they add to regularly, but the best, best is the HQ live that they do on the 2nd Thursday of each month - an hour long instruction on various features, uses of the machine. I have learned so much and it adds regularly to my enjoyment.
I opted for the Sweet 16 as I am unable to stand for extended periods of time. Summarily: You'll love it too.