Oh, I know you were just posting that for completeness's sake but I really don't think it's worth extra, and keep in mind I bought mine before they had an american distro. I paid less than $400 for the whole thing with the doubles kit.
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Ergonomic, adjustable handle - like I said, I set mine, don't care, works fine for me. My husband wouldn't even know it was adjustable. He just doesn't care that much.
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Adjustable crotch restraints on both seats- yay. Seriously...
I used mine from when my son was a newborn and never felt the need. When the strap was too tall I just used it as a 3pt or put the shoulder harness under his arms. Actually you CAN adjust the distance from seatback if you put it in or out of underneath that strap that's sewn to the seat. It's difficult but not too bad.
• One touch quick release wheels - I never take the wheels off, so I really didn't notice. And if I did need to take the wheels off it's not that difficult. It's just one of those pop button/hole deals.
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Solid steel axles To add weight?
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Two pockets sewn into lower parcel tray I use pannier bags, my tray is full of toddler feet. Or I just put a small bag in there.
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Redesigned, sleeker looking canopy The canopy is kind of useless but I have a Rayshade since most stroller canopies are useless.
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"Peek-a-boo" window in the canopy This would be a nice touch, but not worth the money by itself
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Pouch in canopy for cell phone, etc. I use an aftermarket add-on drink tray that has 2 pockets in it for whatever I want to carry AND holds my drink.
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Reclining seat on the doubles kit This is a nice feature and I'm tempted to see if it would fit on my old one or if they changed the connectors (probably) but not enough for me to upgrade. I had my son in the jump seat when he was 2 mos old, no joke. Then my daughter decided she wanted to sit back there (she didn't, at first, but now she insists LOL)
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Locking straps to hold stroller closed There's already a little-known feature to hold it closed, via the wrist strap and a snap under the front footboard, or around the front wheel. If I was going to fly with it I'd buy a bag or just zip tie that sucker closed. YMMV of course.
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New easy on & off grab bar not sure what this means but mine isn't that hard to get on and off. Pushbutton/holes.
The only thing I don't like is you can't use the grab bar if the toddler seat is up front. That is kind of annoying. Other than that I really like it and could talk about it for days.
It's tough to work with when you have to fold it and put the jump seat back on but after a bit of practice I can do it quickly.
I'm not sure if it's tough or not, but we haven't had any problems with it. It looks kind of "cheap" and isn't cushy at all but we love it. I'd probably rather buy it used if I had to do it all over again, rather than pay the "new" price for one, though! I'm not sure what that says about it.
You can probably get one used since everyone will want the Sport one.