SmartPaks are pretty stinking awesome. Yeah, you can find supplements for less if you look hard enough – but you get out what you put in. I love the convenience, especially since I always have to pop in and rush around before school and sometimes I'm feeding really late at night. Also, if you ever have to have anyone else feed for you, it's incredibly relieving to know that your horse will get its supplements even if you're not there.
Lunar is on SmartFlex III, Mare Magic, SmartShine, and Grand Hoof. I love all of them, and they make a big difference for her. It can get a bit pricey, but like I said, you get out what you put in, and I want her performing and feeling her best! :)