A few months ago there were some people wondering how good the game could be controlled when all you have is a single joycon. I had my doubts too, to make that clear right from the start. But now, after playing it for some days, I can finally give my impressions. I've played it with single joycons, the strap being tucked on and also with the strap tucked off, and also with the joycon grip.

I think it feels completely fine. All moves come off quick and clean. My hardest problem has always been using some Shoryukens when standing right (I have no idea why standing right is such an issue for me, but somehow it is) and it worked very well. If it's not working, you're doing it wrong.

Some of the concerns were that the missing d-pad could hamper the controls, but honestly, I don't mind. The stick works fine enough. My personal favorite is playing it with the joycon grip because of the shoulder buttons, they feel more like on a true controller. The SL and SR buttons are also working fine, but I needed some time to get used to them, both with and without the straps. Also, using single joycons might feel awkward at first because they are sooooo tiny, but that's also something I got used to very quickly.

If you have the ambition to become a true rpofessional  Street Fighter champion in real life, you are not gonna stick to single joycons anyway, I think. You would rather go for a Pro Controller because it has a d-pad. But for a casual session once in a while, these controls are absolutely fine.

I played USFII yesterday with my gf's brother, who is a big Street Fighter II fan, and he also felt the joycons were too small but got used to that after a while. On a side note, it was his first time playing Switch at all and he liked it.

Please feel free to share your impressions, too.

I'm surprised that the analog works pretty well. It's not perfect, but the Joycon analog has less travel distance and is "tighter" than the Pro Controller analog, so that makes it's a bit easier to play.

I even played table top mode with the Joycons in horizontal grip, and it takes a second to get used to, but after that I was pulling off combos with no fuss. Just make sure you got that wrist strap though for the L/R buttons. I still would like a Joycon with a D-Pad on it though, but surprisingly SF2 isn't bad with the Switch's analog stick. 

I think it would be more of an issue if someone like Guile is your main rather than a Ryu/Ken, because the analog movements make pulling Hadokens and Shoryukens easier in some ways. 

I don't think the issue is the analogue stick or the dpad on the joycon, but rather that we haven't a good dpad on any main controller for a console since Sega stopped production of the Saturn, where we had proper diagonals.

I would prefer a d-pad to the joycon analogs. I'm interested in trying the new RAP: Real Arcade Pro arcade pad or 8bitdo controllers for it.

People should try the Joycon analogs with the game first though ... you might be surprised how well they handle the game.

The analog stick on the joycon works surprisingly well. I just wish there was a joycon grip with better access to the L/R buttons.

Saw two youtube reviews that both said the joy-cons where not fun to use.
Basically you need a pro-controller to enjoy it.

But it sounds like you found them okay.

I demoed the game awhile ago.

As someone who has like a grand total of 2 hours with Street Fighter 2, the controls were flawless with the Pro controller.

Here in this thread you can find some people who like the controls and there on youtube you have some people who complain about them. So, after all, I think it's safe to say one should try it live and in action.

Yeah, the joycon is a bit tighter then the one on the pro controller.