Overall they have an excellent reputation. Unfortunately they have nothing in my area, but shoppers who have worked with them hold them in high regard. The most general rules of sanity still apply, though. Don't accept any job from anyone that you can not afford the loss if the shop is rejected. If this would be your first job for them and you are uncomfortable, give them a call and ask them, for example, about their expectations on the job to see if you are ready to tackle the project. Frequently high paying jobs are that way due to high expectations (i.e. a whole lot of observations, a whole lot of detail, a whole lot of narrative, etc.) in addition to the large reimbursement amount.