I have both a nutribullet (christmas gift) and an older Kenwood smoothie2go I think its called.
One was about £100 the other was £25. To be honest there is virtually no difference in what they do! Maybe the nutribullet comes with more blades etc but I use them for the same thing and they both work pretty much the same!
I tend to use them to make my breakfast when I ride to work, for that they are great! Its usually milk, bananas, oats, frozen berries, chia seeds and super magic green powder for ultimate health….It fills me up so it does its job!
One thing – I had to take the nutribullet back due to the plastic driver which drives the cutting blade snapping. It was replaced no worries but I have never had any issues with my 5 year old kenwood one. Just worth mentioning!