Toto Ultramax II uses Dual Whirl System, which is powerful, silent, effective and removes the waste completely. It can remove 500 gr solid waste like nothing. You can sit on it and forget about obstructions. Cleaning less often since thanks to its one-piece design, rim without holes, and self-cleaning glossy surface as seen in this Toto MS604114CEFG-01 reviews.
While I wrote this, I saw 59 users giving a five-stars and 4.5 general rate for TOTO MS604114CEFG#01 Ultramax II. The over-all feedback in amazon is really good. But there is 1 user giving a one-star, saying, ”Whether your male or female, if you’re sitting, your stream hits the front inside of the bowl and splash up to the down side of the seat as well as your thighs.” This is the only comment I read complaining about that issue.
If you read the users feedbacks in Amazon, you will see most are about how quiet, effective, clean and comfortable the Ultramax II is.
Pros:
Water-saving while flushing with only 1.28Gpf water consumption each time.
Dual Whirl Flush generates a strong centrifugal effect required for clearing waste from bowl and rim. Extremely glossy trap way helps take the waste down the siphon.
Tank is reloaded in 10 to 15 min.
Very silent when flushing, preventing you from waking up sleepers.