Years ago when I first started they were best of the best even better than OE in most cases, their Blue Streak point, condenser, rotor and caps were head and shoulders above almost anything else on the market. The Red box were top quality USA made parts but not in the Blue Streak class.
Today the Red box means little, it can have a USA made or Chinese part in it, the Green T series box is almost sure to have a Chinese or something else in it.
Still, they are one of the better quality aftermarket producers. If you can find BWD or Intermotor its the same part in another box usually for less money, BWD/Intermotor is owned by Standard. From what I understand they still sell Blue Streak branded parts in Canada but they are just rebranded/reboxed blue colored regular SMP.