I have an LK-150 and I like it a lot. I was a little frustrated with it at first, but once I learned what I could do with it, it’s handy to have around. The two things I’ve used it the most for are making stockinette baby blankets (where I would add a crochet edging or hand-knit cables), and … I-CORDS. My hand-knit I-cords are always lumpy and crooked, but I can make a nice, long, even, 2 or 3-stitch I-cord on the machine in just a couple of minutes.
I made a child’s vest on the machine two Christmases ago. I hand-knit the bottom bits, then did the stockinette body on the machine. I had to stop every other row and manually change the first and last 5 stitches because the edges were garter stitch, and that was pretty tedious to do.
I also made a hat with a fair-isle pattern, which wasn’t too complicated, but I really hated having a hat with a seam so I never tried that again on a machine.
I still hand knit way more than I machine knit.