Conclusion: The Klipsch Custom 1s are a great pair of earphones. The question isn't really whether they're good, but what they're good for . Simply put, that's anything that can be played live without electricity: acoustic stuff, folk rock, country, jazz, soul, and perhaps, at a push, even light rock. If you're in love with heavy metal, modern pop, dance and electronica, take a look at the Sennheiser CX 95 s, Denon's AH-C551 s or Etymotic's ER-6i s.
Summary: The Klipsch Custom 1s are unusual in terms of fit, but worth the money if you're a fan of vocally-driven and unplugged music, such as jazz, country and folk. As long as your music taste plays to their strengths, they're a good entry-level model, but, if you like heavy metal and electronica, other models will serve you better
Pros: Warm and balanced sound, Solid build for the price, Well-suited to vocal and acoustic music
Cons: Not ideal for electronic or heavily synthesised music, Takes a while to get used to the fit