Ds2's birth was fab. It was 5 months ago, so still pretty fresh in my mind, and sometimes I like to think about it as I fall asleep at night as it was such a nice experience.
Basically, I'd assumed I'd be induced as I was with ds1 (not sure why, but I had a real mental block about it) so I was completely unprepared when contractions started at c2am. No hospital bag packed.
I had a bath, took a couple of paracetamol and settled in for the long haul. When it started getting a bit nippy I downloaded one of those contraction timers for my phone and discovered that they were 4 mins apart. Got dh up and told him to phone my mum to get ds1 (1 hr journey). Started to chuck some stuff in a bag between contractions.
It soon became clear that we weren't going to be able to wait so dh phoned a taxi and we set off for the hospital. Contractions were 2 mins apart so it did take quite a bit of time to get down the 3 flights of stairs from our flat 
Dh waited with ds1 for my mum to arrive while I got assessed. Just after dh got to the labour suite my waters broke and ds2 was born 3 pushes later.
Around 5hrs from first twinge to baby 
It was just lovely. Even though I wasn't prepared I just had this sense that all would be well this time. I think it also helped that it was so short, so not physically exhausting, and for a lot of it I was concentrating on ds1 (6).
Afterwards I felt amazing compared to my previous induced birth, however I think this contributed to me completely overdoing things the first week after the birth and ending up back in hospital on day 8 postpartum (which was less lovely...)
I hope things go well for you 
Mind you, I wouldn't recommend packing your hospital bag while in active labour. Predictably, I discovered once I was on the postnatal ward that I'd not put anything useful in it.