I though you meant a machine, lol.
I bought the Boye interchangeable needle set this year and it works very well for circular knitting. But Addi has a great reputation.
Do you use double pointed needles? I got an inexpensive set on Amazon and love them. But still learning, so got point protector / stitch saver ends and kept those on the needles at rest - scared it would all come off. I would love to learn to knit socks, but seems to skilled for me at the present, maybe next winter can start.
I also bought the Addi Express Kingsize circular knitting machine - you can do hats in 30 minutes, but how many hats does one need? I found a local charity for the homeless I can donate to, but spring is here so will have to do that next winter.
I would love to see pics of some of your projects.