Anyway, I might still consider picking it up in a sale on the general principle of puzzle platformers — but I wouldn’t spend much more than about €5 on it based on my experience with Limbo.
It looks like you can’t link to reviews on GOG, but this one also hits on the hugely prolonged death thing. It’s currently on page 3 of the Inside reviews.
Plus, some of the puzzles are rather frustrating, with each death (and there is a ton of them) it takes a good few seconds to get you back to the previous point. It’s distracting and not fun. The charm is broken.
So bottom line: if you like puzzle platformers in general and like Limbo, go for this. If you like Limbo but don’t play many games in this genre, I suggest waiting for a major price drop.