No reason why that will not work as advertised.
It will be VERY directional and you must point the opening of the "reflector" exactly at the wireless access point antenna to get any boost however. This takes an "omnidirectional" (all around) USB antenna and makes it directional. In fact the reception behind the reflector will be nonexistent.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW