I read the book before watching it (it was for cheaps on Kindle store) and I'm on episode 7 now. I think I prefer the TV series, I just got a better connection with the characters somewhat, which surprised me... It is all just so bitter sweet, painful and nostalgic. When I was of a similar age (19 to 23 years old) I went out with an Irish lad who studied at Trinity, who came from a similar background (ish - my ex was poorer, from a big family of 6 kids) but he was very intelligent. First lad in his street in Galway to go to university in Dublin. He had just graduated when we met in London, he's a couple of years older. He actually went out with a well-off girl while he was in school/university.
So much of it rings true, the misunderstandings, the things that are unsaid, the insecurities on both sides. I'm really touched by it.
edit: the big difference I noticed from now and then is the drinking... My ex and his friends all drank A LOT and often. I could never keep up. I used to be shocked and impressed in equal measure by their drinking ability and thirst!