They’re all out in the shops as of July 15th in the UK. In the US, on the other hand, you’ll have to wait until late July for full release and you can only pre-order until then.
As for the kit, it’s a classic design from Nike and the new logo does fit in quite well I must say. What’s really cool about this release is the training range which is nothing short of impressive (full list of items here). You can buy the kit from Kitbag, UKSoccerShop or Soccer.com. As for the training range, you can buy it from Kitbag. Here are the most important kit items:
10-11 Manchester United Home Shirt – buy from Kitbag (or UKSoccerShop | Soccer.com)

10-11 Manchester United Home Shirt
10-11 Manchester United Home Shirt Long Sleeved – buy here

10-11 Manchester United Home Shirt Long Sleeved
10-11 Manchester United Home Shirt Kids – buy from Kitbag (or UKSoccerShop | Soccer.com)

10-11 Manchester United Home Shirt Kids
10-11 Manchester United Home Shirt Women – buy from Kitbag (or UKSoccerShop)

10-11 Manchester United Home Shirt Women
10-11 Manchester United Home Shorts – buy from Kitbag (or UKSoccerShop | Soccer.com)

10-11 Manchester United Home Shorts
10-11 Manchester United Home Socks – buy from Kitbag (or UKSoccerShop | Soccer.com)

10-11 Manchester United Home Socks
And here are the most important training range items:
10-11 Manchester United Basic Rain Jacket – buy here

10-11 Manchester United Basic Rain Jacket
10-11 Manchester United Trainer Track Jacket – buy here

10-11 Manchester United Trainer Track Jacket
10-11 Manchester United Hoodie – buy here

10-11 Manchester United Hoodie
Here’s the 10-11 Manchester United away kit & shirt, in case that’s what you were looking for.
Let us know what you think of this new soccer kit in the comments.