Hehe, mouse support works fine. I test it in Arkanoid, Terminator 2 and Plump Pop. This mouse mode we can treat rather as extra options than something very usefull for games. Mouse is better still

But yes, it works fine, no problems.
Only one problem was when after upgrading firmware Windows doesn't detect U360. I must restart PC and next it works. In HID device manager are 3 devices for U360 now (without mouse support was 2):
HID device
HID device
HID game controller
And in USB devices we have:
USB composite device (without mouse support no device for U360 here).