Side-by-side mattress testing · 144+ comparisons published
Updated May 2026
Category
Plank Firm
LuxeErgo 3400 Hybrid
Comfort
8/10
8.4/10
Support
9.5/10
9.1/10
Cooling
8.5/10
8.5/10
Edge Support
9/10
8.8/10
Motion Isolation
8.5/10
8.3/10
Durability
9.2/10
8.9/10
Value
8.8/10
9/10
Quick Specs Comparison
Spec
Plank Firm
LuxeErgo 3400 Hybrid
Price (Queen)
$749
$700
Type
Hybrid
Hybrid
Firmness
9/10
7/10
Height
11.5 inches
31 cm (12.2 inches)
Trial
120 nights
100 nights (refund to night 60, exchange to night 100)
Warranty
10 years
10 years, handled in-house by Luxe rather than a third party
Shipping
Free shipping
Free UK delivery in 5–7 working days; UK only
Key Advantages
Why Choose Plank Firm
- Flippable design - two firmness options
- Excellent for stomach sleepers
- Great spinal alignment
Why Choose LuxeErgo 3400 Hybrid
- Genuine dual-spring construction — micro springs over full-size support coils, not a foam-over-coil shortcut
- Hand-tufted to order in the brand's own Dewsbury factory rather than imported
- 31cm profile with a hand-stitched border gives unusually strong edge support for the price