been using shades from Mr DIY for my BLM...no complaint.
for my waja i bought online,no brand and still no complaint. It was below RM60.
On both car i do not stick the holding bracket for the rear windon as i never wind down the rear window. On the front door of the waja i only stick the holder on the window frame as i really dont want to stick anything on the leather door trim. The bottom part of the shade rest on the door trim.
U can buy the magnetic type if u r sensitive abt having to stick the holder on your door trim and window frame.
Does it work, oh yes...The interior gets cooler much quicker.
Road block? i went through 2 PDRM road block ( both traffic and the boys in blue ). No issue. The traffic cop just mentioned to me 'gelap ye encik, tak nampak' and i reply its sunshade and can be removed at any time.