"A spec sheet promising premium features for an entry-level price; expect compromises."
The 'Wall Climbing & Waterline Cleaning' feature on a sub-$300 robot means it has the mechanical ability to *attempt* climbing, not a guarantee it will do so effectively or for its entire battery cycle.
This is for buyers with smaller, simple pools on a strict budget who are willing to trade reliability for a low entry price. If you view this as a potentially disposable, one-season solution for basic floor cleaning with a bonus wall-climb attempt, the price may be acceptable.
Anyone with a large pool, or those who prioritize reliability and multi-season use. Buyers expecting performance comparable to established brands will be disappointed. If you cannot afford for this to fail just outside its warranty period, invest in a model from a known manufacturer.