Hi! Thanks for the post. While I would agree the 15" screen space is preferable, unfortunately my budget could not stretch that far.
I tried the competing Surface Pro 3 yesterday as it was finally released in the UK, and whilst the handwriting feature is neat, I could not see it replacing paper. I like writing on sort of rough paper with an ink pen rather than glossy paper with a ball point, if you know what I mean? The SP3 felt like the latter, and my handwriting was terrible on it. It is an incredibly thin and light device however, and I would not hesitate to get one if I had the money to spare. But I have to think about ease of use at Uni and I think the MacBook wins. Bigger screen and a much better keyboard it has to be said.
So I'm now a member of the Mac community full and proper

Ordered yesterday, arrives today.
I'm terrible at drawing anyway so I think I'll stick to quick paper diagrams, take photos and make computer drawn replicas where possible.
I'm not sure but I don't think we are required to take Oil & Gas law in the UK as part of the LLB. I do want to take modules in Intellectual Property and internet law though and I could see diagrams being used for those (indeed I've drawn patent diagrams before) but for such a low number of uses, the other compromises weren't worth it to get a Surface Pro 3.
Also they had a jarring sales rep from Microsoft who shook off all the issues I knew existed with the product, claimed Apple laptops can't be upgraded (when neither can the Surface) and slated Apple needlessly. Oh, and then he whipped his iPhone out!