What you can't do is charge the system and use the kickstand, because the USB port is on the bottom of the unit. Brilliant design decision there, Nintendo.
Anyway, that aside...this thing feels like a pretty quality product. It doesn't feel like your typical Nintendo system, I.E. it has more weight to it and higher quality. Like you're buying a higher-end (albeit plastic) tablet as opposed to a kids' toy, if that makes sense...even though it totally is a toy.
The Switch is much smaller than I expected in person. It's still the biggest handheld out there, but it doesn't feel quite so huge. The joycons and pro controller are also pretty small. People with large hands may have trouble with this.
I downloaded Shovel Knight and Fast RMX. The download speeds were pretty fast and they finished up and installed real quick. Then I set up a Japanese account and bought Blaster Master, which I can confirm runs in English. You cannot use an American credit card -apparently they did something that stops this from working now- however you can either A) add funds to a Japanese Wii U or 3DS if you have one and linked the accounts, or B) just buy a Nintendo Prepaid Card from Amazon.jp or Play-Asia. I did the former and got a code in seconds.
I also want to buy some of the NeoGeo games they have up on the J-eShop and Dragon Quest Heroes I&II, but I have to wait for the purchase to get cleared first.
Right now, I'm very impressed with the hardware. It's really impressive seeing games like Zelda and Fast RMX running on it when this thing is really not much bigger than my smartphone. Now it just needs more games, and the question is whether or not it will get them.