I'm really happy with my Stratified e30 tune so far. Turnaround time is a bit slow since they are in their super busy time. But the documentation and info they are sending is lightyears ahead of what DHM sent me for my tunes. Stratified sends me details, charts, info, pros,cons, all kinds of info. The tuners at DHM would just say "looks good to me".
Its taking 7-8 business days for revisions to my tune which isn't terrible but damn is the car running SO good in the butt dyno and in my logs. The car is running so good.