Had a friend recommend this stuff. Says it kills over 150 types of weeds and is safe on Bermuda and St Augustine of which I have both. Anyone used this before and if so, results? It's pretty expensive so looking for some feedback before I try it. Thanks.

Interested

Very good and very safe - though it could temporarily discolor St Augustine. Use rates are extremely low - like 2-5oz per acre. Works fairly slowly on large broadleafs.
Will control one of the crabgrasses - don't remember if it is smooth or large.

Know what you are trying to control. For a homeowner there are generally less expensive options if you know what you are after.

My lawn service used it last season. Either it sucks, or they applied it terribly, because it did nothing. I had them out doing free retreatments every 2 weeks.