This is the model Chefman sent me as a replacement under warranty from my last one, I’ll say it is a massive improvement! The finish coat on the battery is better, the attachments do much better at lining up with the battery’s housing, and it comes with a case! Been using this one 1-2x a day for about a week now, it feels like an overall improvement on their previous models. If you make smoothies, protein shakes, or even like pre workout and aminos supplements, an immersion blender gives a massive improvement of flavor on them. More so in improving shakes from a shaker bottle and less from a smoothie in a blender, but they’re still awesome.
I’ll stick to my all-in-one slap chop…
Just don’t assault any women of the night 
(Context: The 'ShamWow Guy' cleans up his act )