I have the Amazon Basics one, I think it was about 40 quid. The only down side is that the risers don't lock in like they do on the Les Mills one, so it's a bit trickier to move around, but it's nice and big and I use it for step, pump, Grit and it's great.
I did BA 100 tonight - not gonna lie, it was a struggle after a weekend of chocolate and booze and also the fact I have never done it before, I felt like I had completely lost my mojo! But I think I have just got to push through it and get back to it 