Xornet one was fine as long as you patched the firmware. The xornet II I believe fixes this issue with high LOD. I switched to a mionix castor though and haven't looked back since.
I really liked the Spawn I had. Shame it had some bizarre issue in combination with teamspeak, causing gradually more cpu load until it kept hitting 100%, couldnt play a game when that shit happened...
I went to a Xornet after that. Pretty much the same shape, but a different sensor and lesser build quality. The mouse buttons plastic slowly shaped the button it was supposed to be pressing and it stopped working after like 4-6 months, so Ive had multiple Xornets til i switched to something else.
Never tried the Xornet 2, but if its issues got fixed and the shape remained the same, it could be pretty good for cheap. Its still a bit of a love it or hate it kinda mouse though, but cheap enough to try one out if you ask me :)