This post is in partnership with Time. The article below was originally published at Time.com
By Laura Stampler, TIME
Apple users might want to think again if they haven’t already downloaded the iOS 8 upgrade.
People have taken to Twitter and Apple forums to complain that their phones have been experiencing sluggish Wi-Fi and dwindling battery life, post-update.
If this is proof of a genuine issue with the latest iteration of Apple’s operating system, it would be ironic considering that the update boasts features that identify apps that are the biggest battery sucks.
Apple (AAPL) did not reply immediately for comment. But here are some disappointed Apple users airing their gripes on Twitter:
Anyone confused by iOS 8 can also read TIME’s tips and tricks guide to the new system.