Excellent, simple and rugged.
I use Xbox one as my main media machine using these batteries in an elite controller, charger plugged into Xbox USB. Bought the batteries over a year ago and they still are going strong (even with hyperx headset plugged into the wireless controller). The plastic coating on the batteries are well intact and I see no noticeable drop in capacity throughout the year. These are excellent value because of their ruggedness in use and I recommend them to anyone with Xbox or elite controller. (hint:buy one set of two for each controller so one battery can charge as the other plays)