SRAM

Bought them, for my road bike, because of all the positive reviews of braking improvement, and I was impressed enough that, I bought another set for my off road bicycle.

The reviews are spot on regarding the improvement in braking performance over the previous generation. MUCH greater braking power with less lever force required. No more feeling like my hands are cramping up on long rocky downhills.

The grip and ergonomics have changed but for me it is not a big deal however, I did put on a shorter stem (80 from 90) because of the change in reach (I am 65 so I do not bend as readily as I used to.)

I replaced only the levers and calipers and I use them with my first generation Force eTap AXS front and rear derailleurs. They work fine.

The big improvement, shifting-wise, is the addition of the Bonus Buttons.

Using the AXS app I set the bonus buttons to shift the front derailleur. First generation shifters required pressing the left and right shift levers simultaneously which could be awkward. The buttons can be programmed to perform other functions but shifting the front derailleur is GREAT for me.

Sometimes I buy stuff and later question whether or not it was a good purchase but this one is a no brainer. Worth every penny to me.

Necessity for SRAM AXS road flattop chains. Stock up on a bunch especially if you need to take your chain on/off frequently (like for waxing). Not 100% sure on the one-time use aspect, but better to be safe than to risk damaging your drivetrain.

Really make sure to line up the notches and make sure it's securely locked. I've had times where I line up the notch on the front, but the notch looked "OK" in the back. Nope! That resulted in a snapped power lock

Pairs right up and works without a hitch so far, hasn't dropped connection and does everything I'd want it to. One time before a ride I had to de-pair and pair again after it wouldn't connect, but that was just a weird one-off thing seemingly.

The reason I took off a star is because the unit I received was very obviously a used and returned open box with a bunch of grease everywhere, but I figured as long as it worked it was no harm no foul even though it was supposed to be new.

I have SRAM Force on my Trek Emonda. I decided to upgrade my front derailleur from D1 to E1 (skipping D2) because I was having issues with clearance between the inside of my drive side crankarm and the outside of the derailleur cage while in the big chainring. Setup on the E1 was straightforward with the included alignment tool. As advertised, the cage is narrower. Another noticeable change from D1 is that the bolt for the back of the derailleur cage moved from outboard to inboard. The end result is that there is now AMPLE clearance between the derailleur cage and the crankarm! Quiet and smooth shifting. Only minor gripe is that BTD doesn't mention that a battery is not included (although they disclose that on the Red derailleur). Definitely a pricey upgrade for just a front derailleur, but for me, well worth it!