Rating: 4 / 5
Balloonbed are a UK based company, so for those who don't know, their pads consists of a double layer of pertex sewn into 7 channels. Into this you place modelling balloons (yep, the same ones you can make into giraffes) which are inflated using the supplied pump resulting in a 2/3 length pad. In the morning you simply burst the balloons with supplied pin and the whole lot packs down into a tiny stuff sack.
At only 100g in total and costing £18.99 (approx $33) it scores highly for weight and price, and it is remarkably comfortable once you get over bizarre nature of the concept. The opportunity to make balloon animals whilst camping is also a definite plus.
The only issues I've faced are that it is time consuming to inflate (not fun in high winds/freezing temps) and that due to the extreme lightness it tends to move around a bit when I roll over and occasionally stones puncture the balloons. Placing it inside my bivi bag helps both of these issues though.