Is this set worth $39.99 compared to cheaper PBT options?

At this price point, you're paying for the 122-key count and the specific colorway. Budget PBT sets often stop at 104 keys or use thinner plastic. The full layout coverage here means one purchase handles multiple keyboard sizes if you swap builds, rather than buying separate 60% and full-size kits.

How does Cherry profile compare to OEM for all-day typing?

Shorter travel between rows reduces finger lift, which some users find reduces fatigue over long sessions. The trade-off is less "sculpted" guidance for finger placement compared to the steeper angles of SA or the flat uniformity of XDA. Most users adapt within a week; the bigger adjustment is usually PBT texture if coming from smooth ABS.

Will the blue modifiers work with a black keyboard case?

Yes, though the contrast will read as stark rather than subtle. The powder blue against black creates a deliberate two-tone statement. For a more integrated look, silver or white cases blend the alphas into the chassis while letting the blue modifiers pop as intentional accents.