I have been working on custom software projects of all sizes, along with building our core business management software product, for over 25 years now. During that time I’ve seen highly successful implementations, failed projects and everything
Your reputation is only as good as the customer service you provide. Whatever experience your customers have with your business, you can be sure they will pass on their encounters, both good and bad, to a wider network of friends and family.
I can't stress enough the importance of having an online backup of your data. Believe me, you could lose your data at the most inopportune moment and it will be then and only then that you'll realise the importance of having it for your business.