Have used since 2013
I originally had the free or cheap version (cant remember which) and was pretty limited by it, but once I got the upgraded version there were quite a few more options. There are a bunch of features that would be really useful to a different type of business than mine (Residential Remodeling) but I still really like all the features that I use. The only big drawback I see is that this does NOT work seamlessly to transfer information to QuickBooks.
Jamesdad07 about
Invoice2go: Easy Invoice Maker, v9.9.0