If you think you are one of those people who can hold your camera still enough all the time and get good photos you need your meds changed.
I have used it indoors and out with good results.
Some of the advantages of the monopod versus the tripod are for traveling it does not take up as much room. This is now even more important because if your flying most airlines only give you one free checked bag, and have dropped the weight limits on that one.
But the other great advantage is that when your on very uneven ground or sand you don't have to play with three legs to get things even.
It won't replace thhe tripod, but if you have tried one you may want to give it a look.
I was surprised and happy with the results.