This became my favourite Soft Machine album after the first listen
Before this one, I was mostly familiar with Third. Something that bugged me with Third was the low production quality. I hope it's not just my copy, but it sounds like they've put woolen socks over the mics. The production on Fourth is a lot better sounding in my opinion. The album was immediately catchy and attention grabbing right from the start (teeth). For me, I think this might just be the perfect entry-album into Soft Machine. Perhaps I should've attempted this one before tackling Third.
Very good!