My litmus test for a DM screen is pretty easy: Could I have made something of similar quality myself in less than an hour at the same or lower cost? The answer in this case is no, I could not have.
Construction: 9/10
The DM screen is hardy cardstock. It's about 2mm thick and has the same hardness as the D&D hard-bound books. You could hold the surface with one hand and write on it with the other, it's not those floppy screens of old.
The screen is also in landcape mode rather than portrait. This means you can actually see over it to the battle mat. Always handy. :-)
I would have liked to seen some corner reinforcements, as those always get dinged up, but that's kind of a nit.
Content: 10/10
Every major chart I would want. Combat modifiers, common skills, standard DCs chart, Bend Bars/Lift gates chart, damage expressions, status effects. They're all here. Nice. Common diseases and poisons would have been a nice thing to add, but I use them rarely enough that I don't mind grabbing a book for those. Honestly the information on the screen will cover 99% of the things that I would want to look up. If I had this screen yesterday, I wouldn't have had to look up the jumping rules.
Artwork: 5/10
Purely a personal thing. The artwork is nice, but the halfling looks like an anime character and the displacer beast really needs to eat something. Both females on the cover are dressed in skimpy cleavage-baring costumers despite it snowing. Whatever. I didn't buy it for the artwork and it doesn't affect the main functionality of the screen, so I'm not going to knock any stars off for this.
Reviewer Bias: 10/10
For $10, you really can't beat it. I mean, seriously. If I were to photocopy and then cut/paste all this content onto similar material it would probably cost me right around the same amount, and it'd take tons more time than clicking the order button on Amazon. This screen will likely last a long time (barring major rules errata), so I expect to get my money's worth and then some.
Feature Wishlist:
I really wish that instead of static artwork on the outside they had made transparent pockets. I would love to be able to insert my own paper so that the players can look at a picture of the monster they are fighting, or a map of the game world, or a chart with the other PCs names, etc etc. I can achieve the same effect by using those industrial paper clips, but I don't want to mar the surface of the board. This isn't a huge complaint, and certainly not a dealbreaker, just something that would have been a nice feature.
I would have liked to have had the rules for escaping grabs (Acrobatics or Athletics: Make an Acrobatics check vs. Reflex or an Athletics check vs. Fortitude against
the creature or effect that immobilized you.). I always forget that in the moment, and it's not a ton of text. I'll just sticky-note it, so no big deal.