Pros: Comes with a variety of weights to customized the feel, works well on a variety of surfaces, on the fly DPI change. Warranty service was relatively easy.

Cons: Stiff cord, lasted a year and 3 months of normal use before disconnecting repeatedly whenever the mouse was moved perpendicularly to the cord.

Overall Review: I bought this model as a replacement for a G400 because it looked much sturdier (The G400 also had the disconnection issue) and the cord was stiffer. While it did last longer than the G400 it also eventually started having the same problems. Logitech replaced this mouse for me under warranty with the G400S (an updated G400 which looked like it was supposed to fix some flaws) but that replacement has also started having the same problems after only 6 months. If you buy these mice you should probably take strides towards keeping the cord where it enters the mouse from bending at all.

Overall Review: Purchased in Late July 2021 as a cheap replacement for a Philips' Headphone male-to-male cable which had worn out at the "elbow" where it entered the headphone jack (after 4 or 5 years of use). This cable however, wore out at the "elbow" and became unusable in less than 5 months. If this product goes back in stock, I would only suggest purchasing if you intend to use it to connect two objects which will see little to no movement and/or angling.

Pros: Lightweight, works well on a variety of surfaces, on the fly dpi change.

Cons: Repeatedly disconnected after 9 months of use due to loosening cord where it enters the mouse.

Overall Review: Apparently lots of other people have had the disconnection issue, If you don't keep your mouse straight during normal use you'll risk it happening to you as well. Logitech at least sent me a new copy and has a decently long warranty.