I used to process bw and C41 at home and take the slides to a nearby lab. But after the price hike in processing slides I took the plunge and bought a E-6 tetenal kit. Now all processing are done in-house. What bothered me about the local lab, besides the cost of processing, was the actual trip to drop in and pick up plus the rising parking charges. I could send the films by mail but that's at least a week or two before getting them back.