Great Shifter, at a even better price!
359411
Great Quality. Easy to install.  Had everything I needed.  Was confusing to get the right part, the advertisement was not clear.  Ordered the wrong part first.  As always Amazon.com, was amazingly helpful, with the trade.  Thank you Amazon!!  The shifter was installed in about 8 minutes and works PERFECT!  Would very much recommend this shifter.
4764057
I searched all over town for this shift cable and found the cheapest to be $179 and out of stock.  I started looking online and was suprised to find this item at Amazon and with two day shipping I received the part in perfect condition and saved over $100 as well.

Installed part (which fit perfectly) in about 30 minutes and was running again.
2563676
This is how I received my shifter. I am still trying to figure out how it is a shifter if it showed up in one piece.....
3933493
My old bike's drive train was worn out and I decided that if I was going to swap everything out I might as well give SRAM a try.  I also wanted to try out twist shift to see why they had such a cult like following, well a lot also had to do with them being a hell of a lot cheaper than X0 triggers or even X9.  I a paired them up with a X7 rear derailleur, Sram 970 cassette, cheap KMC chain, a new shimano lx middle chain ring up front, and new cables and housings.  I cut down my old Oury grips and left the old shimano lx front derailleur alone.

The first couple rides I'd twist the wrong way fairly often but that would expected switching from SRAM triggers to Shimano or vice versa too.  After a month of riding with them I'm not yet 100% comfortable with them but I'm getting there.  There has been no ghost shifting and every click is very noticeable by feel and by ear, they are loud.  Being able the trim the front derailleur is nice especially since the one on my bike has never worked worth a damn.  Shifts on the rear are quick and solid and you can twist through the whole cassette easily.  The other nice thing you can do though I haven't mastered it yet is keep a finger on the brake and shift up or down which I couldn't do with the shimano triggers.

Now are they better than trigger shifters?  I don't know.  I never really had an issue with the shimano triggers either. I like the twist shifters so far but I'm not joining the cult yet :).
3589972
New claris sti shifters which is better than the previous thumb shifter model, great improvement. Shifters well for a 8 speed!
2622298
Replaced the stock shifter in my Boxster with this one. Took me about 2h (but also took a lot of breaks) but if you follow the instructions its not too big of a job to complete for amateurs at all.
695379
I installed these to replace the original Shimano Index shifters that were broken.  With the included cables they installed quickly and easily.  After installation my bike shifted better than it ever has.  The shifts are crisp and fast.  I can't believe on $30 made such a difference.  These are worth twice the price.
3123544
This shifter works great, haven't had a problem with it.  It feels a bit clunky and like it's entirely made of plastic but i knew what i was getting into.  If you want a G920 wheel, this is a great shifter for it.
3301546
Shifts very well, a vast improvement on the original generic derailleur.
3106878
Shifter works good and installed easy. It is a little harder to shift than I thought it would be (effort)
2683042
This was the first time I have changed out a Derailleur and I wanted it to be a definite upgrade.  I went for the Prime and I was not disappointed.  The installation was a piece of cake, the adjustment went precisely in step with the clear instructions, and my bike has been shifting flawlessly ever since.

The cheapie OEM Derailleur that had worn out was a Shimano Altus, so the shifter did not present a problem and all I had to do was set the limit screws and the cable length.  Since this was also a good opportunity to clean and lubricate the cable, I effectively, started over with a brand new system.

The RD-M591 is a rugged, precision piece of equipment, unlike the sloppy, lightweight piece of garbage that it replaced. The amount of time I wasted trying to tweak the OEM Derailleur turned out to be a testimony to futility and absolute nonsense!

My advice is this:
If you are having trouble adjusting your Rear Derailleur, and you are following reasonable instructions, it's not you, it's your hardware. Spend a few bucks and replace it with the BLACK, all-metal RD-M591 (you don't need the gold-plated version) and then, you can lean back and just ride, ride, ride.
3586736
Good alternative to replacing the entire shifter lever assembly.  You have to cut the spring to size for a GMC 1500 HD shifter.  Once I realized that, installation was not a problem.  It's way too long for some applications, but it does work perfectly when altered.
4953040
This was a replacement for the identical derailleur that came on my 2011 Trek Ticket Exchange. Funny how smacking the derailleur on the side of an aluminum bleacher bench can mess it up... ;) I'll go the old 'pros & cons' route here, cons first:

Cons:
* Really only one: all of the adjustment screws (high/low limit & b-adjust) have a small sharp "tip" on them for some reason. In the case of the b-adjust, the tip actually eats/chews into the body of the derailleur, right on the edge of a lip, and eventually with some thrashing & such the derailleur body can kind of bounce around between two points (on the tip and off), totally ruining your shifting short term and long term breaking up the metal edge of the derailleur body and ruining the entire unit. I strongly suggest when you get this new, remove the b-adjust screw & use a hacksaw/file/etc to just remove that little sharp tip from the screw to avoid this. This allows the screw to sit squarely on the metal body of the unit.

Other than the above, I've been happy with this derailleur.

Pros:
* Performance: it shifts well, no complaints here. It's pretty crisp, no sloppiness, and no slippage so far
* Price! I'm loving it because I frequently bang things up, since I am mostly freestyling on/around concrete which is not forgiving to derailleurs (or anything else). MSRP is $26 bucks.
2011706
I am redoing an old drag race car that always ran a manual transmission. Replaced that with an automatic trans.  i built a moumting bracket that bolts directly to the shifter. Once mounted this shifter looks exaxtly like the old 4spd shifter that was taken out, now only an automatic. Looks awsome!
3936227
Excellent value for money, more than the average rider needs. I have this shifters in two bikes and no problems
545357
Great shifter to replace cumbersome grip-twist shifter on Electra Townie.  Great price and fast delivery.  Got more than I bargained for!  Highly recommended!
1885630
Awesome shift knob! I'm using it with a Hurst Promatic II shifter as the cheap, plastic Hurst shift knob (which is more expensive than this one) started to malfunction.  The button on the B&M unit is very nice quality and the perfect size for your thumb.