I have used Excelsior cases for 3 of my previous phones. They have all been good. This one fits my S21+ perfectly. The holes are well cut out all around the case that makes it a perfect fit overall. The rubber on the sides adds a lot of grip. Texture on the back is good and it gives a premium feel as this case always does. From my past experience with these cases it will last at least 18 months before the material in the back becomes worn out and shabby like it happened for my Note 9 Excelsior case. By that time you won't need a case anyway because the charm of a new phone would be long gone :) A good case for S21+ overall. Go for it.
This back cover is of premium quality, and is worth over 70k phone. Fit and finish is excellent. Cost could have been slightly but looking at the quality, finish and fitting, do not mind paying the price. Recommended.