The Shark Ion Robot 750 takes its name from the manufacturer's advertising slogan: Ease Of A Robot. Performance Of A Shark. The part about the "performance of a shark" is enough to give a curious consumer pause. Do you really want to unleash a device that will use razor sharp teeth to eat everything that moves? (Cats and dogs beware!) The reference, though, is presumably to the relentlessness of sharks, which until recently were thought to move continuously and never sleep. Alas, scientists in the last decade or so have caught sharks napping, but they're still relentless while they're awake, which is really all you can ask of a robovac. The "Ion" in the name presumably comes from the unit's use of lithium-ion batteries for extended surges of power between charges, but this is hardly the only bot on the market to use Li-ion cells as its power source.
What's more important is what the Ion Robot 750 does while its power is surging. According to the manufacturer's advertising copy, it does pretty much the same things as any higher-end robovac. It scoots around your floor dodging furniture and pets using proximity sensors, slides nimbly under furniture to reach those hard-to-clean places, and uses "helix-pattern high-tensile bristles" to pull snarled hair and fiber out of your carpet. And, yes, it also vacuums, with a removable dustbin on the side so that you can periodically relieve it of its burden of clutter. Dual sidebrushes dust off walls and corners. It can suck up scattered cat litter after it removes cat fur from the rug.
You can program this bot from your smartphone and even give it commands through an Amazon Alexa or Google Assistant. These features are essential, because unlike most robotic cleaners it doesn't come with its own dedicated remote control. Amazon users like this unit enough to give it four-and-a-half stars, with some comparing it to bots from robovac masters iRobot. If you'd like to compare it to an iRobot model, try the iRobot Roomba 655 and proceed from there. Or go farther afield and look at the Neato XV Signature or the Ecovacs Deebot D80.
The vacuum seems much quieter than most others. I've tried testing to see if it actually covers the whole apartment and it does.
Set up was easy, just plug in and let it charge. I was pleasantly surprised by how quiet it is. The suction is impressive for something so small.