I ordered Graze boxes (the dried fruit, not fresh) for about a year, but recently I've cancelled.
1) They're expensive. It's better to go into a health food shop or supermarket and pick up five or six bigger bags of stuff, which would last you ten times longer at the same cost.
2) I found they made my calories creep up. Some boxes are 250 calories, and there's really not a whole lot to them. Perhaps the fresh fruit boxes are better, as there's more to them?
I understand there are two schools of thought regarding snacking/no snacking. I think it's down to what suits you. And personally, if I snack - even healthy snacking - it just blurs the lines between when I should and should not eat, making it harder for me to stay on track.