I used Anaslysts Inc for about 9 years, 10 day
turnaround(not fast)but I felt pretty good interpretation. Unlike Blackstone no universal averages and no comments other then keep in service or this metal too high etc. The last year or so I have used Blackstone, very consumer oriented, but I hate their universal averages and too many of their comments are not appropriate as they are guessing about your engine, etc. and what they consider high ppm would never even bother Analysts Inc. (unless silicon got over 32 ppm Analysts Inc could care less) I feel they place way too much emphasis on the ppm counts for lead and silicon especially. But just my opinion. they can be slow also, due to holidays the last one took two weeks. However, I will keep using them, basically good friendly service, easy to use containers etc. Easy to contact as well.
Like everything in life, comments need to be taken with a grain of salt.