If you have issues with shoulders, shoulder blades, neck, etc., you will marry it and you should marry it. Do the exercises that your physiotherapist will give you almost daily and you will see a great difference in mobility and pain reduction.
I highly recommend it and in fact, I also got the red one (medium hardness) to start due to acute pain in the left trapezius.

It does not have good elasticity. Anyone who has tried good tires will understand. It is indeed a strong tire, but its lack of elasticity does not allow you to do many things

For me, it is as hard as it should be. It has good elasticity. It requires a lot of attention not to stay in the sun.

Very good and high-quality elastic band. I would say that the resistance is appropriate for exercising with proper intensity. The next level immediately after this one, I believe, will be quite challenging