Koo-Di pop sleep bubble worth buying? Feedback please.

[DialMforMummy]

Well that's it really.
We were thinking about getting one as an alternative to a travelcot. I would interested in your views.
TIA

Hi i bought a Graco travelcot/playpen as the dimensions were bigger. I found that by 6 months my baby liked to roll around and put his arms out and his old travelcot was too small. It looked a bit like this one. He would wake up when his arms hit the sides. They grow so fast!

Anyone can shed any light on the difference btw the £40 ones and the £60 ones?