It's just a good deal. Costco frequently sells at this price with coupon.
I'm trying to decide between this and the designer series. I assume its just a different base as well as not getting an extra container.
The designer series has a touchscreen and someone in this thread said those touchscreens can become flaky preferring real buttons. I'd prefer that as well along with an extra container. I've never had these types of high end blenders and this price is a bit too high for me and I'm waiting for a slicker deal.