老貓再看看: does anyone have experience hiring a personal lawyer?

Does anyone have experience hiring a personal lawyer, like a beck and call type? Is it very expensive? I remember occasionally receiving soliciting mails from some lawyers saying that if I pay them a small amount of money each month, they provide some petty services whenever needed. Does anyone have experience with such services? Is it worth it at all? And are these lawyers any good at all? Thank you very much for your input!