@expat, I'd love to know which model you got.
Sorry, am travelling at the moment.
I have the Sirui N-2004. Never had a problem with the monopod in heavy rain (sat out using it all day), humidity etc. many times and never once hinted there may be an issue. It can carry a lot and even more than I described above.
Go to a store and check one out you will be amazed at the monopod part especially, but also just how small the lot compacts into.
I am not the biggest fan of the tripod part, works great and I use it all the time but am about to buy something different, but when I use tripod I mainly am doing video which is why I have the head mentioned earlier.