Answer: There are literally hundreds of sites where you can get pos software and they all make great claims. However Intuit Quickbooks have been recognized by Consumer Reports as having one of the best system around.
Answer: No, there are much less expensive camera's that do the same thing. You do not need to invest that amount of money to record simple videos. But then again I'm a frugal person so I wouldn't spend the extra money on something that frivolous.