I have tried the square knitting needles and determined that they were not the right kind of needles for me. When I knit when not looking at my hands, I use the curve of the needle to help find out where the stitches are. With the square needles, I found I couldn't find the stitches properly without looking. If you have a chance, try them at a store before you buy. Most knit shops will have needles that you can try before you buy. It is a very personal thing, buying knitting needles because each knitter has their own way of knitting, and preferences for feel.
I bought a set of Cubics interchangeables shorter tips which are square and made of wood. I like them and use them when I need wood because of slippery yarn fiber content. I like them just fine. I have interchangeable tips of all material types, but the only interchangeables complete set I've ever bought were the Cubics. I think somewhere i have some Kollage fixed circular square needles. Those are of metal and I remember that I liked them, too, although right now I am not sure where they are in the chaos of my house!
Knitting with square needles is not tiring at all I presume. My mom has severe rheumatism and she didn't knit with normal needles (circular and DPN) for years. I gave her my Cubics just for a try.
First she was skeptical, but then fully convinced. It takes a bit until they become accustomed.
Her hands hurt no more, because they probably will not cramp while knitting.
I find they are comfortable to use. However, I changed to working on circulars for all my knitting, even if the work is flat. This way it will save in the long run on how many needles you have to purchase. The interchangeable ones are the best kind of circulars. That way you only have to purchase different length of cables.
I have several in different sizes and materials and use them really often besides my Chiaogoo and HiyaHiya.
If you are a tight knitter, they could help you getting the required gauge in patterns. Even for knitter with rheumatism, hand- and shoulder problems it's the best solution, imho.
I bought the Kollage interchangeable set as a present to my mom, after a knitter at my knitting circle raves about them. My momlikes them enough, but isn’t crazy about them. I have tried them on one project and, contrary to the intended use, put my fingers on the corner. I guess I’m not used to them? Anyway, your mileage may vary!
I own a Prym set which I purchased on a whim. I am very happy with them but do not "feel" any extreme difference to the traditional ones.
The set I have is pricey but to be honest I wouldn't recommend these needles for the reason that, as I said, to me they feel like the round ones.
Save up your money.
@devra No, the "knobbiness" of the needles. They're eventually hard on the hands. The cubic design creates hard sections all around the needle.
On the other hand, I love Signature needles because they're smooth and silky, even the larger sizes. I'd recommend treating yourself to your favorite size in Signature and your favorite size in the cubics. You can choose the sharpness of the ends and what kind of needle top you like, eg "domed," or "spiral" etc.
Let me guess which will be your favorite ...
The photos I just took on my phone don't really show the "sharp" sections of the cubics but after awhile, they're very uncomfortable to use.
Oh dear! Call me traditional..................... but, it sounds like another way to part you from your money and the new-fangled, expensive improvement (??) to be put in the back of the cupboard.......................