I've been using Paypal as a payment processor on my websites for a long time but have never used them for my painting business. The reason is that they are very quick to pull money from you if there is ever a dispute even if you can show a contract in writing with an agreement to pay.
Also, they charge peoples accounts in a strange way and sometimes attach your name to charges you didn't make.
For example, one time I charged someone $125 but it showed up on their credit card that I charged them over $3,000. The client complained that I had over charged his account even though I had only received the amount agreed to which was $125.
After talking to PayPal on the phone I found out that the clients account was in the negative of $3,000 because they had had a back charge and so the next time their account got charged they grouped it together and charged their account all at once. So, in the end I got paid $125 which is what was agreed to but got a complaint put against me for an over charge because PayPal used my name to bring their account back in line.
Anyways, I know that's a confusing story but I don't like the way PayPal does certain things. Even though it was their fault they still sided with the client.