Would you recommend buying Stainless Steel 17-7 PH Spring Wire and why?
I don’t think any of us can fairly answer your question without knowing what you’re using the wire for. It might not be strong enough, or might be overkill; you may be using the wrong type of wire or, for that matter, the wrong material altogether. Stainless steel is good for many things, especially if the item might face moisture at some point, as it does not rust (or not easilly anyway).