This isn't a comprehensive review, rather a few general ideas about the modules "Tarrent and Nogrod", "The Ruination of Tenamen", "Secrets of the Od City", " DD V1 Sample Dungeon", "V5 Referee Quick Starter" taken in aggregate.
These dungeons are all designed to be introductory or example offerings for low-level "normal" play. They focus on "meat and potatoes" (to use melan's phrase) content: monsters, mainly humanoids. I assume this is to highlight DD's rules for "normal combat". There are clearly NPCs and factions which offer negotiating/politicking opportunities, and an occasional cockatrice or ogre providing occasions where discretion is probably the better part of valor; nevertheless, these modules are all strongly of the "hack and slash" variety.
Tricks and traps are rare and tend to be of the mundane variety. "This was once a kitchen", "kobolds drop rocks through murder holes", "the orcs lower a portcullis to prevent escape" (those aren't quotes from modules, just an attempt to show the gist of what I mean here). Writing is terse, clean, straightforward, readable, quickly absorbable.
The biggest strength of these modules is that they are flexible, customizable, easily adaptable, like b1 and b2. There are also some great names within: "Mabyagzeurg" the spider, "Jitterhex" the sword, "Guzaag" the orc, but these are interspersed with weaker names. Nothing within is hacky or weak content. The distribution of monsters, treasure, and empty space feels right.
My biggest suggestion is: These all have a very "greyhawk level 1" feel, but are missing the slow descent into unnerving weirdness of gary's modules. Good d&d for me is pools, fountains, traps, statues, paintings, one-way doors, climbing down ropes, and puzzles, but really really good d&d for me is having funhouse rooms skillfully cloaked in "versimilitude" and "mythic underworldness" so that they aren't jarring, but give the fear of the unknown mixed with the engagement of discovery. B1 has the room of pools and Zelligar's lab. Zenopus tower has the brass head, the rotating statue, and the "dancing" dagger. B2 has the very spooky shrine of evil chaos. A few "tricks", "unknowns", and "interactables" would make these modules shine.
I love the covers for the DD starter kit modules Ways, it makes me want to run a spider cult temple!