I recently bought a Lenovo laptop with this wireless card in it, and have been having problems with it. Although I can get connected OK, the wireless connection is very slow, and if you run a ping or tracert, there are lots of timeouts. It's not the router, as countless other laptops work fine (including the Lenovo this was to replace). I've tried disabling N, but that makes no difference.
Is it worth risking an upgrade to an Advanced-N 6230 or am I likely to hit the same problems with that?