I have Lacey on a ration balancer (Purina's Enrich 32 which isn't the best one out there but it's the only one I could get) and I really like what it's done for her. I found that she seems more "all there" mentally, if you know what I mean. Like, she used to have days where she was just a fruit loop and it was like she was gone inside her head. Her body was there but she wasn't thinking and there was no way I could get her "down". Since she's been on the ration balancer I've found that she's more all there all the time. I think maybe she was missing a nutrient or something and that the addition of the ration balancer helped fix that.
I've also found that she's less hot. She still has hot days, of course, but it's more of a under control "OMG! I'm so happy! I would desperately love to go run around, if that's ok?" as opposed to her previous "OMG!!!! I need to run around and I don't care if I kill you in the process!!!" hot.
But anyway, I really like what a ration balancer has done for Lacey. And I can add all her supplements to it instead of giving her a handful of grain which she most certainly does not need.
Also, with a ration balancer, you're only going to feed about a pound of it per day for full nutrition so even though the bag itself is expensive (for me it's $27), it lasts 50 days (50 pound bag).