I have that machine, I bought it from Costco last year, which means, if they have it now, it's a re-order, and Costco doesn't do re-orders unless it sells very well the last time.
I use it to fly on airplanes when going to quilt retreats. I took it to Staples and found a rolling bag that fits it perfectly. I have to say, it's a workhorse. It sews the same as my (expensive) home machine, Symphony. I highly recommend this machine. Having said that, I don't sew button holes.....
You can ALWAYS return it to Costco if you don't like the buttonholes.