"A large, manually-operated riser that bets on surface area over specified engineering."
The '40 inch wide surface' provides ample room for two standard monitors and a laptop, but the unspecified depth and weight capacity mean you're gambling on whether your specific setup will fit securely and be stable.
This is for someone on a budget with an existing desk, who needs a wider-than-average surface and has a relatively lightweight monitor setup. It makes sense if you're willing to accept the risk of unstated specifications for a lower price.
Anyone with heavy equipment, like an Apple Studio Display, an ultrawide monitor, or two 27-inch+ screens should avoid this. Users who prioritize guaranteed stability and published engineering tolerances will find better-documented options elsewhere.