Seems to be pretty decent for this price?
Here is the comparison of J20 Ultra vs Roborock S8 MaxV Ultra
【All-in-One Docking Station】
This multifunctional docking station automates maintenance with efficiency. EUREKA J20 robot vacuum cleaner features automatic mop washing, dust emptying, and a sophisticated mop drying system using 45°C warm air to ensure hygiene. Additionally, robot mop manages water by collecting dirty water, refilling clean water, and dispensing detergent, complemented by a ventilation system to prevent odors. Simplify your cleaning routine with this comprehensive care station.
【RollRenew Fresh Water Cleaning & Innovative Cycling Belt-Mop Design】
Harnessing an exclusive design, the RollRenew system continuously circulates fresh water to keep mop cleanliness, while the Innovative Cycling Belt-Mop Design applies a strong 17N downward force, thoroughly scrubbing floors with every pass, removing tough stains and ensuring a high-quality clean.
【Powerful Suction & Carpet Recognition】
The robot vacuum and mop features a robust 8000Pa suction coupled with advanced carpet detection technology. Upon identifying a carped area, it intelligently lifts the mop and shifts to a non-absorbent side to keep carpets dry and clean. This ensures uninterrupted cleaning across various surface types, allowing for efficient multi-surface cleaning in a single pass without the need for manual adjustment.
【Laser Navigation & Enhanced Sensors】
J20 robot vacuum cleaner and mop use laser technology to avoids obstacles, recognizes walls, and ensures the robot can climb thresholds up to 22mm while providing anti-drop safety, ensuring the robot deftly navigates complex environments. (Only support 2.4G WiFi)
【6000mAh Battery Life for Comprehensive Cleaning】
Experience uninterrupted cleaning with a powerful battery that enables up to 130 minutes of operation, allowing the robot vacuum to cover up to 400m² on a single charge. This capability ensures your entire home is cleaned efficiently in one session, reducing the need for frequent recharging.
【Enhanced User Interface with Multi-Language Voice Control】
Control your robotic vacuum effortlessly through voice commands with support for Alexa, Google Assistant, and the newly added Siri. Accompanied by precise navigation and customizable mapping via Eureka app, these features allow for tailored cleaning schedules and real-time monitoring, providing a seamless and personalized cleaning experience.
I can't comment on anything else in this, but the "strong 17N downward force" that is claimed as an outcome of the "Innovative Cycling Belt-Mop Design" is I think actually an effect of 'um, it is just over 1.7kg'
or is there something in that which is not just marketing speak?