I too am with Stroma, I was with Elecsa before that and napit before them.
I'm can't say a bad word about them, their surveillance visits are good the guy who comes out to me is a gent and even let me download to my phone some documents that had gone missing since last year's assessment so that I had no non conformance's!
And they are half the price of the others, no brained to switch really, especially as I try not to do domestic so don't have that many to register a year.
Not tried their software online for the testing though as I have whatever they are called now,, that's it shineforms!
Sy