It would depend on how often you are charging a customer. If you have several customers everyday, you might want to consider that since it might be a pain point

It would depend on how often you are charging a customer. If you have several customers everyday, you might want to consider that since it might be a pain point for your customer. But since most "freelance" work takes a little time and you are limited by the number of personal hours in a day, I don't think it would matter too much if you only accepted checks. On the other hand, Square is extremely convenient and free to use (other than a per transaction percentage charge).