Super low (1.0 GPF) Flushmate toilets

Hi, I am wondering what feedback or experience anyone has with the Sloan "Flushmate" 1.0 GPF toilets? I can get the Mansfield "QuantumOne" 1.0 GPF toilet with the Sloan Flushmate technology at Lowes for a reasonable cost, but no one can tell me how they work! The 1.6 GPF Flushmate feedback seems good, but we're looking for a very low flush product so long as it works well and you don't have to flush multiple times!
Comments greatly appreciated.

The Flushmate-IV 1.0 GPF system operates in the same fashion as their 1.6 GPF systems, is tested to the same standards, and, with a flow-rate in excess of 70 GPM, provides almost identical performance.

Realistically, it may be necessary to double-flush once in a while but that will be the case with any toilet, regardless of its flush-volume.

If performance and conservation are your primary concerns, Mansfield's Quantum One is an excellent choice and should suit your needs perfectly.