I have one of these coming. $41NZD. No issues with the current one, but, more speed is good.
The ones at ascent etc were all mini pcie, not the correct M2 / NGFF ones for our laptops.
Update - this has arrived and I have just installed it. Works well, now as a link speed of 300Mbps (only a N router).
Can now copy files off my laptop @ ~20MB/s.
What was shipped was the std intel version instead of the dell one. Had to disable the BT part and then re-enable as it was initially disabled due to the bus address changing.
No need to update any driver files - current one worked without issue.
Only issue is that the antenna connectors are small. Very small. Aligning them was "fun".