Using these D'Addario EXL140 guitar strings is straightforward. First, make sure your guitar is properly tuned to the right pitch. When you're changing the strings, take one old string off at a time and replace it with a new one, then tune it up gradually. For best results, use a good quality string winder. As for note - bending, the flexible plain steel high strings make it easy. When you're doing heavy chording, the powerful low - end strings will give you a great sound. When it comes to maintenance, wipe the strings down with a clean cloth after each use to remove dirt and sweat. This will help extend their lifespan. Also, store your guitar in a dry place to prevent corrosion. If you're using drop tunings, the EXL140 set is a perfect fit, but remember to check the tuning regularly as these tunings can sometimes cause the strings to go out of tune more easily.