I have a basic STBK suit (£30). Never been stung through it, and after three years nothing wrong with the suit itself, and it washes great. I did replace the hat and veil this year because the mesh developed a small split. However, at just £8 for a new hat and veil, I'll happily stick with my cheap suit and replacement hats for as many years as I can.
Would be great to be able to find a source for good quality woven mesh so that I could replace this myself, but so far no luck.
I understand why people might want a ventilated suit if they have lots of hives, but for less than a handful myself it's not really an issue for me.