I have been using this for the best part of 6 months now.

Annoyingly you can't put the date into the UK dd/mm/yyyy format. You are instead stuck with the US mm/dd/yyyy format, something that I struggle to get my head around. The author has advised that it wont be changed.

The output directory defaults to /tmp when installed. I forgot to change to somewhere sensible and my invoices seem to have disappeared.

I bought this to keep an eye on how much of my day was going to which of my masters, rather than the need to actually invoice anyone, so the app is overkill for me.

Would I send the money again? No, it is over the top for what I need and inflexible in areas such as date which should be flexible. It is simple ti use though.