Been ‘evaluating' different units for some time and concluded there was no perfect machine. The Revo has a lot of benefits and some drawbacks. Principally for me I rated the orifice and dual scrubbers as essential; the user interface (manual add block) as simple and therefore easy; the fully enclosed counter lungs as safe and easy to clean; multiple (5) cells as an advantage; the build quality as top notch; small size of the scrubbers, strength of the unit, handle, ease of mounting the three tins and battery, twin scrubbers reducing running costs, RMS monitoring predicting scrubber life, Petrel + Nerd2, flat trim when compared with some other units, etc, etc. There’s only one right system and that’s the one you own. The Revo looks right from an engineering perspective so therefore probably is. Have still never dived a rebreather and am looking forwards to diving flat in the water. Have so much to learn. Also looking forwards to all the help and assistance from others here. Will be practicing with another person on here who’s also starting out in the silent world. Do hope to join others who are also starting out with CCR.