DIY coffee candle

I saw this around the internet and thought I'd share my views on it.
I firstly thought this would be a waste of coffee beans considering a lot of them are used here. However, I love the smell of coffee - it really helps with keeping myself on track. The idea is the heat from the candle will make the coffee bean scent more noticeable  The scent of coffee doesn't radiate the room strongly but lingers around the room. If you leave and come back into the room you can definitely smell coffee and in such a nice warm way!
It's athletically pleasing too, looking simple yet different. I think these would be great in a coffee shop too, they just look great!
Here's the original picture I found from pinterest:

Obviously the more you have the stronger the smell will be although I doubt it would ever be overbearing. I've had 7 new candles recently and this sort is by far my favourite, even more so than the christmassy ones! 

(Just don't do what I did and knock it over. Coffee beans everywhere. They really do fly.)