Luckily im not having any discomfort but some friends and family members have been feeling sick after few minutes of playtime, so be warned before buying. -I can tell a response time difference between this mouse and the Razer Death Adder Elite (I also swapped my Razer Black Widow Ultimate Stealth 2013 for a bloody keyboard and its is miles ahead of Razer)Cons-I can only change the color of the bloody logo, the middle mouse button/scroll wheel stays red, but thats honestly not a big deal to me. They have no knowledge of this supernatural place that is suppose to be there birthright. The drawers are actually foldable And fabric feeling which is thought they’d be wood for $70 some dollars but overall it’s great. Im using them to hold coiled up cables/wires in my home laboratory. Die Beleuchtung ist sichtbar, aber nicht so hell, dass gleich alles in blauem Licht erstrahlt. Their product support does nothing, call wait times are ALWAYS through the roof, and somehow, theres always 4 callers ahead of you 🙄 what a crock I ordered a 51/2 but received size 39 whereas a 51/2 is actually 381/2. I find them comfortable and the packaging was great. Works perfectly, very happy with this purchase.