Just received my new 13" RMBPro and an SFBags.com Outback Solo case. The Solo is a waxed canvas small messenger bag with a very solid chocolate leather flap. The flap buttons with a magnetic snap. For a bit extra, you can order the Solo with a carrying strap that threads through the back of the leather flap.
On the front of the solo are two pockets. One is obviously designed for an iphone 5s, the other is a nicely bulky pocket with an extra large fold at the bottom so you can keep larger items in the pocket and they won't interfere with the closing of the leather flap. In the phone pocket I keep several pens, an apple ethernet adaptor, and a pair of nail clippers. The large pocket is easily able to hold the charger, a couple of cables, my in ear headphone bag, a cellphone charger and has a little room to spare. On the back is a long, slim magazine pocket. I can fit my ipad 3 in the pocket.
The build quality is amazing as with all Waterfield Design bags. I already have a Cargo, a waxed Muzetto, 3 gear bags, a laptop sleeve, and 2 wallets. The seams are all very thick and double stitched, and the inner bag is solidly padded. The leather flap is made of high quality leather and the magnetic fastener doesn't come unlatched.
My only small quibble is that my laptop doesn't fit quite as tight as my MBA fit in its WF laptop sleeve. Literally you had to grab the end of the sleeve to get leverage to pull out my MBA. There is some wiggle room on the Solo for my RMBP. It slips easily in and out, but is still a nice fit. However, I don't see my laptop sliding out of that bag as long as the leather flap is buttoned. That fastener is strong!
All in all a quality product as is all SFBags.com equipment. I would never hesitate to recommend them to anyone.
PS. I apologize for the image quality. The galaxy note 3 just doesn't take very good low light pictures.