SCArchwrote a review of SRAM Force 1 Type 3.0 Rear Derailleur on December 27, 2018
Familiarity: I've put it through the wringer
Earlier this year, about 2000 miles ago, I changed my makeshift 1X (Shimano Ultegra) to real 1X (SRAM Force 1). Many people say Shimano works better, but I trusted my LBS and went to SRAM. They were so right. Shifts are more solid, positive, and accurate. The derailleur stays in adjustment better too. Now that I've lived with the derailleur for a while I can tell you WHY it works better.
#1 SRAM moves 1mm for every 1mm cable pull, but Shimano moves 2mm for every 1mm pull. SRAM can be adjusted more precisely and temperature extremes have less effect.
#2 the SRAM cable attachment point is a large arc shape that keeps cable-to-pivot distance constant through full gear range.
#3 Shimano feeds each shift in 2 steps - half on the push and the other half when returning the lever to neutral. SRAM makes its entire pull in a single large step as the lever is returning, which is a more reliable and positive action.
#4 SRAM pulleys are narrow/wide type, guiding the chain more accurately.
Negatives? With double tap you can accidentally shift the wrong direction, but that is very rare after the first couple learning curve rides. When riding into a very steep hill at night (can't see the cassette) it is sometimes difficult to tell if you are in lowest gear or next-to-lowest.
Winter rider note: Double tap levers are much easier to use with gloves or mittens than Shimano.
Bottom line is that I recommend SRAM derailleurs.