We have had our Poco Plus since teh begining of January and absolutely love it. We use our carrier for our 3 year old boy who's currently about 2stone 4lbs and he is really comfortable in it. The carrier is really light which is important when your carrying a heavy load. We also own a mac pac vamoose which we love and now use for a 1 year old but it is so much heavier than the Poco that there is really no comparison. The pac has a fixed hip belt which is different from most of the carrier out there but having now used both im undecided which i prefer. THe fixed is excellent for heavy kids as it means they dont send the pac lunging to one side when they lean over to grab a rock!
The pac is well made and the sunshade a pretty good bonus, however im not sure that the rain cover is as heavy duty as it could be, in a thunder storm the other day out daughter stayed perfectly dry in the mac pac but our boy was slightly damp around the edges in the Poco (it was however a serious down pour so i think it would be fine in most situations)
Overall we are really pleased with out purchase and the service which we got in store from Cotswold Outdoor, the Cirencester branch. Would most definatly recomend for those who want a heavy duty carrier, well worth the money!