Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great upgrade to E2C or any other entry level canalphone!

I bought these because I found my previous phones, the E2Cs rather annoying to keep in my ear and also because I felt like an upgrade. If you're more of a bass-head, I'd still recommend the E2C. The E4s bass is slightly better defined but just a tad less deep...and I really mean a tad.Overall sound quality is as good as the very MANY online reviews say it is. Not best of class but very musical. If you are listening to music for pleasure (not work), musicality is a good thing. Slightly exaggerated mids clarity and moderately extended (in duration not depth) bass are some of the embellishments.Overall a good buy for the price (175 USD) and it's a good 70 USD cheaper than all the stores in Singapore.Kudos to Shure and Amazon.com!