I have an Ellipse and a Sologne and I have to admit I use the Sologne a whole lot more simply because I teach and it's tough to carry a heavy bookbag/briefcase, a coffee and a hand-held purse. Plus, I find they get too heavy and my arm gets sore carrying them. I also find them awkward for shopping -- it's hard to carry clothes and a heavy purse!
I like the look of them, but they aren't very practical. I've never cared for the Speedy, so no temptation there!