The Good: The Kevlar actually works in preventing ripped crotches good minor protection
The Bad: There not skinny but rather a slim so can get caught if you don't tight or tuck them in to socks. The price The protection isn't as good as they say The color fades from black to more of a brown/black color after washing them after a while. quality isn't great in the sewing and attachment of the Kevlar pieces.
Had them for around 7 months so far with no real issues. So the Kevlar lining is what makes them special and it's actually a successful idea. Now it's not going to replace your shin pads or knee pads but it does offer protection that other jeans don't. So protection wise they reduce the marks you would get and some of the pain, not a huge amount but it's noticeable.
The main selling point they should be sold with is "no more ripped crotches" i ride them mainly for that. i have gone through so many pairs of jeans through riding, skinny or regular and now that's no longer an issue.
The only real gripe i have with them is the fact for a so called skinny jean there not very skinny and more of a slim so they do get caught in the sprocket and chain occasionally if you you don't tie them up with string or tuck them into socks ( if you wear an ankle guard and shin pads this issue seems to be eliminated)
few minor issues include: the belt strap sewing is poor and had to re sew a few of them,the color fades after a few washes, the Kevlar is attached with some glue adhesive so i had to re glue some of them and £90 is allot for jeans but you save in the long run.
so aside from the issues listed above there amazing and you won't need to buy another jean for bmx again