I've had good results with All 3X. I am just about done with my bottle of it. I like the manageable size, since when pouring into the drawer of the Duet with a large container, one can end up with detergent in the fabric softener dispenser if not careful. I don't always use the cap to measure, as it's easy enough to eyeball it. Sudsing is very low. I only noticed more sudsy conditions once, and I think that had more to do with what was being washed. Long story but I think that load had a couple of items in it that were washed previously in a top loader that did a lousy job of rinsing.
When out at the store last weekend my partner wanted Tide but it was 1) way too expensive and 2) there was no he type except with bleach and he didn't want that. So I advised the All 3X was once again a good deal, $3 cheaper than Tide, but he said the problem he has with the 3X container is that you can grab it either way since it has no handle on it, and you can end up with the pouring spout backwards. Not a big deal to me, but he's so pro-Tide that he had to make an excuse. So we ended up with All 2X at the same price as 3X, because that container has a handle on it. Sheesh!
I did have my first-ever sighting of powdered he detergent at that same store but again, it was Tide and super expensive. I'm interested in trying my Duet's soak & wash cycle, which requires powder due to the design of the detergent dispenser. When the Tide is on sale I'll grab a box.