Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Is this set a right and left shifter/brake set-up?
Document: The Shimano 2300 is the entry line Shimano shifter set and groupset. as you would expect from shimano, the unit is reliable and has great quality. although these don't have the reliability like the Dura Ace, they sure work well. The shifter has a visual indicator for which gear you are on, which is great. the lever throw is kind of far but it seems clean and shifts work quickly and flawlessly. the brake levers are perfect and stop on a dime.
compared to down tube shifters, the sis brake-shifter sets are nice and easy to use when riding fast or hard. They are a bit trickier to keep in tune (until you get them right), but they are a great invention. It is a excellent upgrade for the older 14/16/20 speed drive bike. After the shifters the next thing I would upgrade is to buy a great chain.If you don't have them, the price is dropping and that makes them very affordable.
That is affordable. Shimano is like an excelllent sewing machine, while Campanolo is more like a Mercedes  4300 model is better than 3300, which is better than 2300. all those are entry level shifter-brake sets.
haven't use them yet but these look like there going to be very durable. these are my first set of sit shifters. they feel heavy compare to the drop bar i bought to pair these up with. but for the price you can't really argue these kinds of things.the good thing about these it feels like the brake lever won't bend over when you put allot of braking power into it like the other junky ones that came with my bike, (plastic maybe).
The left one comes loose, like, all the time. I'm not sure why. Pretty good quality. They shift. I've put over 1500 miles on them and ride pretty hard.
it is located on the side of the shifter hood and is operated via thumb, which can prove problematic whilst in the drops.
now about the brake line? buy some jag wire to compliment these and your have a big improvement over the braking performance.
I got these in hopes of being able to upgrade my 1989 trek 1200 from downtube to STI. It worked! The shifting is very smooth and the components are top notch.The only thing that this kit didn't include was adapters to hold the cables in place once the downtube shifters were removed, luckily its possible to just drill a hole in the old shifters and run a cable through there.All in all this is a great set of STI shifters and will work with ancient derailleurs and 7 speed cassettes.
This product came and worked momentarily... then broke... and I have crashed on my bike 3 times now because of it... You get what you pay for.The Gear shifter does not shift it is just loose.I disassembled it and need to do further work..I just do not have time to send products back as I am CONSTANTLY using my bike... I NEED BREAKS.Wow...-WTF
Good shifters. I used this on my 7 speed Shimano casette. It does a good job. Although this is an 8 speed shifter, it works pretty smooth on my 7 speed casette.I have some small complaints:1. I wish Shimano could add some grease along with the cable in there package. I had to buy grease seperately.2. There is no installation guide. I had to use my intution and videos on youtube to install the shifters.3.
Answer: yes