Nice! I've been wanting to make myself a laptop messenger bag but hasn't made it to the top of the list yet.
It's been a pretty useful bag, but my laptop is SO heavy and big I don't like to carry it around very much... I liked the Amy Butler pattern but I left out the hanging pocket inside and next time I would leave out the zips elsewhere in the bag. Too much work for pockets I don't use!
Nice bag. It will come in handy for you.