First the install instructions don't include crucial information such as the exact width of the brackets from the blinds material. This made centering it with external mount extremely time-consuming and far more difficult than it needed to be.
As for the blinds themselves, the rolling mechanism is awful, doesn't lock up when you want it to, then locks when you're trying to roll up. The claim that the material is 'fabric' is an outright lie, it's just vinyl. The roller core is just weak cardboard which immediately started bending in the middle so it doesn't roll smoothly. Upon replacing the first one, the second one was worse. The pin mechanism was broken out of the box, after I replaced that with the existing one, the blinds made screeching noises upon rolling up and down.. which I was unable to fix with WD-40 so I put the old flawed one back up.
It is such a mess of a product I wouldn't trust buying anything from Blindster again, huge mistake and waste of time.
Response from Blindster
I'm sorry you had a problem with your roller shade. I do show in our notes that we are having a new blind sent to you that should work properly. If not, we will issue a refund or get you a different product.
This fabric is a polyester blend, not vinyl. The only vinyl shades on our site are clearly labeled as such.
I will contact you after your new blind is delivered to make sure everything is OK.