disadvantages
Need a shield guard as the flame can blow out
If you take it high level i.e. munro's if doesn't work that well
If you take it high level i.e. munros you have to take the fuel which can be heavy up with you 
Boiling water can take a long time 

Conclusion great for basecamp or trekking, poor for munro bagging

Would I buy again if had to - No to cumbersome, and limited to were you can use it.