Tucano are an Italian firm who specialise in making laptop/notebook bags and all other "technical" bags. Their products range from about £30 all the way to up £250. You can pick this bag up for about £40 from lots of online and offline stores.
I bought the 15.4" version of this bag for my Apple Mac Book Pro which has a 15" screen. The bag is also available in a 13" version which will fit all PC/MAC laptops which have up to a 13" screen.
The bag has a classic messenger style and is designed especially for laptops.
Inside there is a compartment for the laptop which is secured by a velcro strap and two cushion type pads for which the laptop sits between.
I have found the velcro strap to be very secure, my laptop never moves around inside the bag and the cushions keep my laptop snug and secure.
One of the best things about this bag is the amount of pockets inside which will house accessories such as usb wires, a mouse, chargers etc. There is also another section inside the bag where you can put documents or magazines and books.
I have used many laptop bags over the years and have found Tucano's range to be the best. The laptop stays secure and is cushioned from shocks, there is always plenty of room to carry accessories/personal items and they always look neat, professional and stylish. I have been using this particular model for 13 months now and the bag is still as good as new.
The only problem I have with it is that the front flap is velcro secured rather than having a zip. When I have personal accessories in the front which can easily fall out like wires and phones I always feel they are safer in a zipped compartment. I have another bag from Tucano which is all zip sealed.
I wouldn't hesitate to reccomend the Tucano brand and this model is especially great if you need to carry a lot of other accessories as well as your laptop. Just