The zoomed MVB is pretty effective. I used it at one point but, because of what Cooper said about the MVB and its absurd cost, I went back to bask bulb and UVB separate.
Also, while rep cal is probably the best, other brands like Nat Geo are good too. What you really want to watch out for is multivitamin choice. Herptivite for example, uses retinol(I think) and beta carotene(reptiles can dispose of excess beta carotene through their poop) while some multivitamins use retinol, aceitate, or both and synthetic vitamin A(reptiles can't dispose of excess synthetic vitamin A through their poop like beta carotene). So, while somewhat unlikely, you can unintentionally provide too much vitamin A to the beardy(hypervitaminosis A) when giving multivitamin.