I've had this adapter for a couple weeks now as a replacement for my Asus M50-Sv1 and it works perfectly. I plugged it in, the charging light came on, and it's been doing great since. The connector is the same size and fits like it should. It's also longer than the original cord, which is very helpful in the classroom where outlets are scarce. You can't see it in the picture, but there's a velcro strap that you can use to wrap the cord with. It also has a power indicator light on the brick, which is apparently not in the picture above.
I'm happy with this purchase, and the price is great! If you need a replacement adapter, check to make sure this one is compatible with your laptop and then buy it!
Delta Electronics ADP-90SB BB Compatible New AC Adapter. BRAND NEW Compatible adapter. Package includes: Adapter and Power Cord. All sales include a 30 day unconditional return policy and 1 year warranty.