Stevia-based sweeteners for me have the same effect as sugar-free sweets - they cause 'air' shall we say! Even if I only have one TS at breakfast! Yes I too have a box to use up as they've all come on the market recently. I've tried Truvia in a jar and and Pure Via sachets when they were on offer, but won't be buying more. I find they're slower to dissolve in yoghurt etc (even slower than old-fashioned sugar) which may make them appear less sweet. The Truvia is supposed to be much sweeter so 1/3 of a ts is the same as 1 ts of sugar, and I find that to be true, I do use a lot less. I also notice the taste as I really don't like liquorice so any hint of that puts me off. Avoiding aspartame (though it's the ingredient of choice for food manufacturers...) so I'll stick to Splenda which I have been using for years and years.