In some cases when you run in to a merchant who has a restaurant or a larger retail operation you will need more features than a tablet based point of sale can offer. I use Aldelo when I run in to this situation. They offer many advantages that lower level systems do not including kitchen displays, fingerprint login, and liquor liquor accountability. If your client needs the extras included with this system it is easy to see how Aldelo can help their business. I have not partnered direct with Aldelo since onsite implementation is required and some technical knowledge. They have representatives all across the country so if you refer your client to them a local Aldelo rep can get them all set. All you need to do is provide them with the VAR sheet and they will implement the processing in to the system.
Aldelo Point of Sale Website: https://www.aldelo.com