Blind Spot Mirror stick on recommendation?

[Thrift Store Scott]

N-OS X-tasy! wrote:
[quote=norse]
I have this one. I like it because it is adjustable. I mounted at top right corner.

http://www.amazon.com/gp/product/B0032J1...QC63TGZMHD&coliid=I18BT0BRDZLKFM&psc=1&ref_=wl_it_dp_o_pd_S_ttl

How much adjustability is needed for a convex mirror?

EDIT: I see that that unit is a concave mirror - interesting choice. I'll also note that I am immediately skeptical of any product whose pitch includes the words "As seen on TV!" "Concave" has got to be a typo in the description; If it was correct, the image would be reversed.