I find LO to be very buggy and unintuitive in its UI. Equations are a pain, it forgets styling options, etc.. But as a user who uses it completely independently of MS Office, just for my documents, the peace of mind I have knowing I am using a powerful multiplatform open source software which won't betray me is priceless. I know my documents are safe and I can move between OSes at my will. This kind of freedom is ess…
As for the unintuitive UI, it is a complex product that is designed to meet a multitude of needs. In that respect, it is not all that different from Microsoft Office. (If anything, I find it to be slightly more intuitive than Microsoft Office since the means of achieving some things in Microsoft's product is downright quirky.)