LibreOffice Impress is horrifically bad. The Undo function is unreliable which is an enormous data-destroying pain in the ass when editing a presentation. The tools for editing text and vector graphics are also inconsistent and buggy.

I do all my presentations with Slidy. I can't think of a better "tool". It also make it so easy to put your presentations online:

https://www.w3.org/Talks/Tools/Slidy2/

No offense but "ew". The demo page is hideous and I don't see how you can easily do graphics with that. Maybe it's fine for making slides for people to look at later, but for actual presentations slides, that looks like a recipe for PowerPoint hell.

I guess if you use impress/PowerPoint to do you graph, which I don't.

LibreOffice is good enough for typing up a few simple paragraphs and occasionally tweaking the font.

Anything even slightly complicated, though, will look like a modern webpage rendered in IE6. This is merely annoying with Word documents, but downright catastrophic with PowerPoint slides. I don't care how many obscure features it can emulate if it can't even render line spacing properly.

Except for the Find feature that never works right. Cmd-F and try to paste into that box, for example. I use LibreOffice daily but that one is annoying. It crashes once a week too. I think LibreOffice is close, but I don't think most people are going to give up Excel for almost as good as Excel.

Sounds like you're referring to this bug, which is finally seeing some attention

https://bugs.documentfoundation.org/show_bug.cgi?id=49853

LO should basically never crash, ever - the stability work is stupendous. If it does, there's something deeply wrong with the system.

If the crashes are reproducible, do be sure to file a bug.