I've been using it for about a month now and I'm happy to report back that it has really helped. I was probably a week or so away from a full-on flare and it really helped my system (stools, gas, etc) get back into a normal pattern.
I did start slowly with just one small dose a day and worked my way up. Last time I attempted Citrucel the gas was unbearable but I haven't experienced gas at all with Metamucil because I started slowly. I also started with the liquid - which I didn't mind but ended up switching to the capsules just for convenience sake.