its been OK for me, but...-any- cns/psych drug can cause unexpected results. i dont think its super common, but increased mood instability, depression, suicidal thoughts, etc. have been reported with lamictal, trilpetal, etc.
sometimes an anti-seizure drug+antipsychotic is the best thing ever. sometimes, weird stuff happens. i take lamictal and abilify, but depakote and abilify triggered the worst agitation, anxiety, tics...just, bad news, sad times, all around.
so, it really depends. oh, and dosage. i felt more energetic at the low doses, as the psych doctor was increasing the dosage...
it wasn't until it hit 200 or so that i simmered down and actually felt more "stable" or what have you.
try to communicate with your psych doctor about anything, or at least...a doctor. :-)