The best feature is its ability for me create an invoice template with all my information which I then send out via email using templates from other apps like Outlook/Outlook 365 etc..
It's very easy process! And it has many features such us PDF creation too so you don't need another app just use this one instead!! Nothing really dislike about anything but maybe if there was some way we could sort items by price rather than order date? We are solving issues around invoicing in particular when sending quotes through emails where clients want them right away without having any delays because they might be busy at work during working hours.