I've read a few of them (5 of longlist so far, 3 of which were shortlisted)
The lighthouse I quite enjoyed. It was quite melancholy and a bit depressing but beautifully written and structured.
Narcopolis I really did not enjoy. It was very disjointed and leapt about. I didn't find the characters particularly engaging and found the whole thing pretty hard going.
Swimming home was quite enjoyable. Sone interesting observations on the nature of mental health problems and also about family dynamics. Some of the characters were a but sketchy though and could have been a bit more fleshed out.
BUTB I havent started yet. I find the whole capital punishment thing very disturbing and found it quite distressing through Wolf Hall that it was all inevitably leading up to it. I may read it or may avoid.
The thought of reading a Will Self book makes me vomit a bit in my own mouth so I won't be bothering with that.
The garden of mists (or similar name...) is waiting for me on my kindle.
Of the longlist I also read Harold Fry (fabulous, moving and uplifting- well worth a look) and Skios (can totally see why people wouldn't enjoy this as it is a farce and very silly but... Suspend disbelief and it is actually great fun IMO)
I like to try to read nominated books every year and have enjoyed it this year 