I personally do like going to first previews if I can and then potentially revisiting via rush, standing room, etc. The reason I like the type of deal I got (1,500 points + $42) is because every time they have had an offer like that, I have gotten great, full view, orchestra seats. Don't know another way to get that type of seat at that price, so I am always happy when something like this comes about.
All orchestra, except where noted- For Oh, Hello, I got row L on the aisle, Fun Home I had row F in the 100 section, Finding Neverland was row P, Gentleman's Guide was row A of mezz, but right in the center, Eclipsed was row J.
These are often the first row of seats where premiums end, so far I have always ended up leaving happy with the seat placement.