No I'm unable to click the correct 'User...' name from the list of posters that the app gives me 
No it's not always a positive experience, but it can be. You hear far more horror stories than you do good ones, but I think that tends to be more because the women who've been through a traumatic time need to talk out their experiences, whereas those who had a positive time don't need to do that (I base that on no statistics other than my own discussion with many friends and family who've had children).
I just don't like to see women come on forums like these asking what they can do to try and have a good experience, to go into it with an open mind, to then be shot down with sarcastic comments like, 'I truly do hope you have the beautiful birth experience you're hoping for. Come back and talk to me when you've actually experienced it.'
Some people do experience that - I did (water birth). Yes it hurt like fuck, but I knew it would. And I needed medical intervention straight after I delivered meaning I had to leave my baby for a couple of hours and be rushed to theatre - but the fact that I'd stayed so calm meant I don't look back at it negatively, it was still all pretty good. So I don't think women should be shot down for doing any preparation they can that may help them get into a good headspace.
I agree about the potential self blame after a birth not going 'to plan' being a worry, but I do think comments like yours are damaging too in the sense it implies that every birth has to be a negative experience - I don't think it's healthy for the OP to focus on that for the next 5 weeks.
FWIW I didn't pay for an expensive course or buy into the woo - I read a book, listened to a couple of podcasts, practised some breathing techniques and just stuck it all into practise on the day.