As a full time photographer I rely on equipment I buy for a reasonable price to last for years and years of semi rugged use. I've owned two satin eclipse umbrellas since 1995 and used them nearly daily. A word of caution- whenever used outside they make a great sail; weigh down your light stand, Once they fall you'll have to buy new.
Good value for the money spent and is very well made and easy to use, ie, removal and replacement of the black cover
I used this umbrella as my primary diffuser until I purchased my softboxes. I now use it when shooting on location and when I want to diffuse my remote powered external flash. Versatile with shoot thru and bouncing. Black cover works great to block light from reaching camera lens.