It was Course 1, and a while ago now, but I gave up because it all sounded like incomprehensible vowel sounds and I couldn't suppress the urge to just parrot back the English at Iestyn (I parrot back at the self service machines in Tesco too sometimes )
I've given up on the Welsh for the moment anyways, but I'm actually learning quite a lot by osmosis from living in Wales, and seeing it every day. I can understand the station announcements at Caerdydd Canolog now, which is probably about the only practical use I have for Welsh.
I can assure you I'm no stranger to hard work - I learnt French as an adult, still take night classes in it to keep my hand in, and am now teaching myself dutch with francophone resources in between studying physics with the OU... I live a sad life, I know
My plan for Welsh is to go back to Welsh for Adults once I've absorbed enough to be able to keep up with all the Welshies. I tried that once before, but I was the only true beginner in a class full of false beginners, so I was already behind before I'd begun! I do find SSIW a useful resource with the transcripts to hand, but I've come to the opinion that the SSiW approach as a whole is not geared towards the particular way that my brain is borked, and yes I have argued with Aran about this before.
At the end of the day, I'm someone who gets on very well in conventional language classes, with appropriate reasonable adjustments. I'm happy to leave SSiW to those who really do need it