Very easy to customize and tweak to just what you want, within reason. Very professional looking output document.
UPDATE: Just configured invoices, payment receipts, and statement of account for one of my businesses. If you are a single company, there may be cheaper alternatives out there but I've found the quality of this software to be excellent. If you have multi-company needs you are hard pressed to find more value for your money. The periodic reports for ME, QE, and YE of 2018 were a breeze to produce and send off to my clients. I used the Bronze plan for 2018 and seven LLC/S-Corps. I upgraded to the Silver plan for 2019 so that I can work with the invoices feature. I was using Xero online and was paying substantially more for a one-company product. Yet for that modest amount the features and quality are top notch. EasyBooks 7.8 is easily the best Accounting app I have used that has multi-company support.