I guess It is depended on how you use it and what you are using with.
I use Gorillapod quite often with K-3 and one of the heaviest lens attached is FA50 macro. it is a tank and quite heavy for a 50mm lens. No problem using with DFA100 wr too.
But, but, but it is also used with a ball head + L-bracket
and I avoid doing acrobatic orientation. something like.. hang it upside down on a tree branch with a K-3. If you use a heavy body like K-5, K3, do not try to take portrait orientated photo without an L-bracket too.
another annoying problem with the Gorillapod.
The Gorillapod's plastic legs are well... plastic, and each joint can be cracked. Once it is clicked, it will be lousy. I got at less one crack in almost every joint! there are youtube tutorials show how to fix it without losing it flexibility. but they use paper, I use a sheet of plastic and rubber glue which work very well for me.
besides that, I am happy with my Gorillapod and use it quite often on my night cityscape photos.
I can't say it more convenient or better than a typical tripod, but for sure, it lighter than full side tripod and more flexible than fix legs mini-tripod.
For example, something like
this. It is a dirty, 3-4 cm thick high glass wall in front of me. doing long exposure on top of a thin glass wall like that will need either a Gorillapod or a clamp.