question
 

Are you limited on the number of Splendid's you can use in one day?

You are limited in the number of calories for sweet treats (It's 100 now right?). And I think the purpose of that is to limit consumption of artificial sweetener. Of course, you could drink splenda-sweetened drinks all day and never hit the limit, so there is a way around it. I don't think splenda intake has specifically been limited. Generally, though, I don't think it's good to use too much. I try to limit to one or two packets/day. It does seem to cause cravings in some people, and it gives me gas if used in excess.

There is like under 1 gram of carbs in 1 splenda packet and it says 0 cals... but obviously is has to have some calories in more amounts.. I use splenda in my water (with a squeeze of lemon) and my iced tea and coffee.. I LOVE IT.. I think its better than sugar itself! ;)
I say, if its not causing you cravings and what not go for it.

If I remember correctly, the Splenda that measures the same as sugar (in the big bag), is 50 calories for a cup. I count it in when I am using recipes but often I'm not suing very much at a time.

I use 2 packets daily in my cereal, sometimes 1 or 2 in my Greek yogurt. And I drink a lot of diet pop daily, plus an occasional skinny latte. So I guess I use a lot. It doesn't cause any problems for me and helps me enjoy my food.