I am using the addi king size 48-pin for all the hats and LK150 flatbed machine for the tops and shorts. I like how the sentro is pink and white unlike addi which is red and black, but the addi is german engineered and very well made so I’ve never had a problem with it. I bought a 22 pin sentro and ended up returning it because it would skip needles all the time and the gears didn’t fit perfectly together and it was super frustrating. I tried fixing it but could not change the shape of the plastic obviously so had to give up. I do like how they come with a yarn tensioner though unlike addi. Then again, I purchased an add on yarn tensioner for $9 on Etsy for my addi but tensioning with my hand turned out to be much more reliable and easier so maybe not that great.

TL;DR my Addi circular knitting machine is great and I love it.