Dreame X40 Ultra
$$$ FlagshipTrending Down$539.99
tldr; Reddit generally praises the Dreame X40 Ultra for its incredible mopping ability, strong suction, and advanced features, though one user returned it.
$539.99 on AmazonSentiment Breakdown
34%Positive
Positive
34%Neutral
56%Negative
10%Based on 1,669 Reddit opinions
Strengths & Weaknesses
Each axis shows what % of Reddit comments are positive about that topic. Higher = more praise.
Key Features
- SideReach for Unreachable Spots: A liftable, extendable side brush tackles wall corners and furniture legs, thoroughly removing dirt. X40 Ultra safeguards rugs from wet-dry mess contamination.
- Keep Carpets Dry with a Removable & Liftable Mop: X40 Ultra protects carpets from moisture by removing mops or auto-lifting them to 10.5mm(0.41inch). Set zones to avoid rugs, reducing the risk of getting stuck.
- 12,000Pa of Forceful Sweeping: The industry-leading 12,000Pa* suction eliminates hair, dirt, and debris for a cleaner home. An optimized air duct design ensures efficient airflow, keeping the passageways unobstructed for a smooth cleaning session.
- Smartly Fight Stubborn Dirt : With the help of OmniDirt detection and MopExtend RoboSwing technologies, X40 Ultra detects tough messes and scrubs them deep under low furniture and corners.
- Auto Maintenance Keeps You Hands-Free: Simultaneously cleans both the mop and washboard with 158°F hot water to reduce stains and foul odors. Adjust your cleanup with 4 temperature levels in the app. Only support 2.4G WiFi.
- Precisely Learn Your Home: With 3D structured light, a built-in camera and LED light, X40 Ultra smartly maneuvers around your home all day long. Customize modes, pet zones, or mopping levels with a single tap in the app.
- Non-Stop Cleaning with a 6,400mAh Battery: X40 Ultra boasts a formidable 6,400mAh battery for extended, efficient cleaning performance. And it automatically recharges at the dock and resumes cleaning. Optimize charging during off-peak hours* to save energy costs.
- 💪 Incredible mopping ability, leaving
Sentiment Over Time
Historical Price Data
Dreame X40 Ultra
Dreame X40 Ultra
All-time low: $499.99(2025-11)
$38 below 90-day avg
What Redditors Actually Say
What Redditors Say
Best praise vs top criticism for Dreame X40 Ultra
Best Praise
+8 pts“Love my X40 Ultra. Hard to go wrong with majority of these Chinese robovac flagships these days.”
r/RobotVacuums
ViewTop Criticism
+11 pts“I tested and retested the Dreame X40 and X30, they just didn't do as good as the older L20, I don't know why, but it was consistent over many tests. Same thing with the S8 MaxV vs the S8 Max Ultra. The short answer is that before I did this new test, I was mostly just guessing about relative differences in mopping ability, I could do the basic mopping tests that I did, but those really only helped me find particularly bad mopping robots, they didn't help us to know which one was better than another in an objective way. Now that I have a system that, at least I believe is accurate, it will change the rankings going forward. You could argue that I shouldn't weigh the mopping ability scores so heavily in the final rankings, and I may revise that in a future algo update, but for right now I think its a good system, even if it radically changes my view on which are the best robots out there right now. One thing I have found over the years is that every release of every product is different. certain little changes in manufacturing change performance metrics even with its not supposed to on paper. testing products in increasingly better ways is the only way to keep the manufacturers honest.”
r/RobotVacuums
View12 more quotes available below
Related Products
Frequently Asked Questions
Is the Dreame X40 Ultra worth buying?
Reddit generally praises the Dreame X40 Ultra for its incredible mopping ability, strong suction, and advanced features, though one user returned it.
What do Redditors love about the Dreame X40 Ultra?
Redditors highlight: 💪 Incredible mopping ability, leaving. 🔧 Strong suction for vacuuming capabilities.. ⚙ ️ Advanced features including RGB camera.
What are the downsides of the Dreame X40 Ultra?
Some criticisms include: "I tested and retested the Dreame X40 and X30, they just didn't do as good as the older L20, I don't know why, but it was consistent over many tests. Same thing with the S8 MaxV vs the S8 Max Ultra."
How accurate are these ratings?
Our sentiment analysis is approximately 80-85% accurate compared to manual review. Products with more mentions (Dreame X40 Ultra has 1,669) tend to have more reliable scores.
1,669 Reddit opinions analyzed • Last updated 4/15/2026