Peter 642

Don't much like the 996 blind spots and I'm thinking of Suncoast's aspheric mirrors: http://www.suncoastparts.com/product//9X6AMS.html

1. Read other posts on this; someone commented that they may be "illegal" in the US? That strikes me as odd.
2. Install easy I assume?
3. Downsides if you've done it, and don't like them? Not sure if current mirror is same as in older (2006 and past) posts on this.

Thanks.