I absolutely love smartpaks!
Like someone said, they're pre-measured daily portions in these little containers that they mail to you every month so you don't have to worry about reordering, measuring, carrying tubs of supps to shows, etc. It's fantastic for multiple horses, esp since they mail you a plastic labeled file cabinet to keep everyone's smartpaks separate.
However, if you're looking for an easier way to give your horse supplements, SmartPaks aren't going to do it! If your horse doesn't like the ulcer meds, you're going to be opening the great little pre-portioned containers.... and still adding applesauce to shoot down her throat. Unless you're asking about a different product that smartpak carries that may be more palatable?
Their shipping rate is the same base rate no matter how much you order and it comes quickly. AND, if you're horse is already getting supplements shipped to you, they can put a new order and mail it with your supps and save you shipping! AND, if you have other people at your barn who are wanting smartpaks they can do a 'barn buddy' shipping system where it doesn't cost you any more to ship. They're wonderful!