I am using Pastel and have been playing around with Manager and now want use it. My bookkeeper says it is not worth it. He says it is only a few people using it and here about ten people here. I do not think so. Is there a way to proof he is wrong. He will then apologise and also accept my Manager data.
I myself kind of feel stupid answering this. 
Anyway check the site statistics at the below link.
Thanks a lot. I will show him this info.
Why bothering proving anything to the bookkeeper. If you want to use Manager then use Manager. If he doesn’t want to look after your accounts by using Manager then get another accountant. You don’t have to prove anything to him - you are the customer!