Clean Harbors - Is it worth the hassle?

My company hauls loads for clean harbors but I never see their rates so I have no idea what my company is making per mile. This company is a real pain in the butt to work with. Yesterday our appointment time was 3 PM and we were sitting there until nine before our load was ready. This is not an isolated case. We had one that we had the haul to Arkansas and we waited almost 48 hours for a spot to open up in their yard to do a drop and hook. I'm wondering if it's all worth it. Have any of you hauled loads for clean harbors? A while back I spoke with an owner operator for our and our transport and he told me he flat out refuses to haul loads for them. I'm a company driver so I do not have that luxury but when I get my own truck I might be a lot more selective depending on how much they pay. Does anybody know what the rates are for clean harbors?