I have used several over the last few months & so far this is the best. Big enough for my needs (I have twins and a toddler).
My only criticism would be that it DOESN'T fit easily on all double prams. I have a donkey duo & even on the most extended - the bag 'pram handles' do not fit (width ways at all). It depends if you really need it to cover that (the donkey duo basket is poor considering it is a double) - I can use the over the shoulder strap & make do. Though, saying that, I'm not sure I would actually find a bag to comfortably fit the duo.
Absolutely brilliant. We had a changing bag before for our youngest, standard sized which suited our requirements. however upon having twins we needed a bigger one. This manages to be much larger inside, comfortably holding everything we need, from bottles, to powder, from clothes to nappies, and it does all of this without appearing too much larger on the outside. internally there are lots of pockets to keep everything tidy and easy to reach, some zipped, some insulated. The main shoulder strap can be made into either a shoulder strap or can clip around the handlebars of a pushchair, the sequence between the two involves 2 clips. couldn't be easier.