Skip Hop Dash:
This is a messenger-style bag with a flap that velcros over the main compartment. There are 5 outer pockets: 2 wide ones on the front, below the flap; one on each side, under the strap; and a large, shallow one on the back for the changing pad and perhaps a magazine.

The pros:
The Dash is just big enough to hold the things I normally keep in my diaper bag: a diaper, some wipes, a changing pad (we don't actually use it anymore, but it's so unobtrusive that I never took it out of the bag), a few toys, sunglasses, my cell phone & keys, a container or 2 of snacks, a water bottle, and perhaps a hat or light jacket for my son.

The Dash is durable and well-made. I've used this thing for 17 months, and it still looks brand new. Nothing has fallen off, come unsewn, ripped, or broken. It's beautiful.

The Dash hooks onto the handlebars of my stroller, so I don't have to shove it into the tiny basket under the seat.

The cons (or, why I wanted to get a new bag):
The Dash is a little too small for those times I want to bring along more things. We use cloth diapers, so they take up more space than their über thin disposable counterparts. That means they don't fit in those slim little pockets in the bag, so I'm forced to put the diapers in the large main compartment. We're pretty close to being finished with diapers anyway, thanks to elimination communication, so I usually only pack 1 spare diaper in case we're out somewhere without potty (or tree) access, but I remember when he was a newborn and would go through diapers a lot faster. Once I threw in diapers, wipes, and a burp cloth, there was absolutely no room for anything else inside the diaper bag.

The Dash's flap doesn't stay closed. The "hook" part of the velcro is on the flap itself, so it sticks to anything poking out on top, like a diaper that also fastens with velcro, a blanket, or a sweater (eek!). The bag often falls over in the trunk of my car, and things roll out.

The Dash's outer pockets close with velcro. It's nice that they close with *something*, but boy, am I tired of getting scratches on my hand from the "hook" part every time I stick my hand into one of the pockets.

Skip Hop Expo:
This is a clean, simple bag, taller than it is wide. It has 3 outer pockets: one covered with a flap (with a cell phone pocket inside), one uncovered, and the same shallow changing pad pocket on the back.

The pros:
The Expo unzips along the bottom edge, which expands to hold more stuff. Without expanding it, the bag is about the same size as the Skip Hop Duo. It's the same width as the Dash (13"), but a little taller (14", vs. the Dash's 11.5") and not as deep (Expo 3.5", Dash 4/5"). When expanded, the bottom of the Expo doubles to a whopping 7" deep, which is enough extra space for me to throw in more snacks, a change of clothes for my son, and a bottle of sunblock, and still have room for more of my own stuff, like a hat, camera, and an extra bottle of water.

The Expo is made of the same materials as the Dash, and looks to be just as durable.

The Expo also has the stroller conversion straps, as do all of the Skip Hop bags.

The cons (or, why I returned it):
I was hugely disappointed to see that the Expo does *not* zip closed. I thought it did (based on the pictures I saw before I bought it), but that's not the case. It closes with velcro, and each side has a zipper at the top, which opens to reveal a shallow pouch (one is deeper than the other).

The Expo only has 2 outer pockets (not counting the large changing pad pocket on the back), both of which still close with velcro. The covered pocket is fine on the hand-scratch issue, since the velcro is on the flap and the outside of the pocket.

My conclusions:
They're both great bags. They're trim and clean and very well-made. They come in a wide variety of color options, none of which are flowery or cutesy.

The two models are the same price, USD $64, which is a decent buy for a designer diaper bag. Some of those suckers can get pretty pricey, but Skip Hop has managed to combine quality workmanship with affordability.

If you don't carry much in your diaper bag, the Dash would probably be fine for you (as would Skip Hop's $50 Duo). If you want a little more space, the Expo's a good choice. If, however, you're the kind of Mom who carries everything anybody might ever want or need, you're likely to find these bags' capacity to be too limited for you.

If you don't have velcro issues like I apparently do, Skip Hop's family of diaper bags may meet your needs. If you aren't a fan of that scratchy, grabby stuff, stay away from Skip Hop...or plan to get out your scissors and snip away all the little squares in each of the many pockets. Or you could just wear gloves - but not knit gloves, because they'll get caught on the velcro, too.

I'll hang onto my Dash until I find something with a nice zippered top. Any recommendations? Right now I'm thinking a regular old backpack is looking pretty good.