iRobot Roomba i3+ EVO · iRobot Roomba Plus 415 Combo

The i3+ EVO navigates without a camera, on a gyroscope and a floor-tracking optical sensor, which is what separates this tier from the i7 and s9 above it. The same choice cuts both ways: nothing on board can photograph a room, and the robot maps by driving the floor rather than by seeing it, so the map has to be rebuilt when the layout changes.

Mid-tier positioning means it sits between the budget i4 (no dock) and flagship s9+ (smaller body, more powerful brush); buyers must choose between saving $250 or gaining the s9+’s corner-reach design.

Water-only pad washing skips a chemical cartridge to refill, and skips the deeper stain-lift a detergent wash cycle adds elsewhere in iRobot’s lineup.

No published per-charge runtime: buyers get a 330-minute charge time and no way to know how long one cleaning session actually lasts.

Units still running pre-EVO firmware

Imprint Smart Maps reached the i3 and i3+ as a free update in 2022. A unit that has not been updated lacks smart room selection and Keep Out Zones until it is.

Owners avoiding recurring consumable costs

The Clean Base uses disposable bags, rated at about 60 days of daily use per bag. Smart mapping itself is free and has never carried a subscription, but the dock's bags are an ongoing cost that the non-plus i3 does not have.

High-pile or shag carpet households

Owner reports document brush jamming and suction loss on high-pile carpets, consistent with other iRobot models in this tier.

Households needing a documented per-charge runtime figure

iRobot has not published a per-charge runtime figure for this model, only a 330-minute charge time for the 5200mAh battery, leaving coverage-per-charge unconfirmed for buyers who need that number before deciding.

Owners wanting automatic detergent dispensing at the dock

The AutoWash Dock washes and heat-dries the DualClean mop pads with water only; buyers wanting an automatic cleaning-solution cycle for dried-on messes need a different dock tier.

Buyers prioritizing the strongest suction in iRobot's combo lineup

At 20,000 Pa, this model is the entry point among iRobot's current AutoWash Dock combos; buyers wanting the strongest suction in that lineup should compare other current models.

Thick, deep-pile carpet homes

No independent test of thick-pile performance was found, and 20,000 Pa is the lowest published suction figure among iRobot's current wash-dock combo models, so performance on heavy shag or high-pile rugs remains unverified.

Buyers requiring a multi-year ownership track record

The Plus 415 Combo launched summer 2026 with no independent hands-on reviews published yet; owners wanting years of documented field reliability should wait or choose a longer-tenured model.