Thanks for the follow up.
I am talking veritas prep right now and they have skill builder section, Actual lessons and then home work problem. I am not sure how much time you have to dedicate to GMAT studies but if you have one month and can devote 3 hrs daily- You won't finish the veritas prep. Their lessons alone are 27-30 hrs long (Total lesson duration) then you have to do the skill builder before the lessons and then home work problem after the lessons.
Then you have to take few practice cats for timing and pacing strategy. I believe that you have to be put in some real effort if you want to finish all that in one month- Hence My recommendation for
Magoosh. Veritas is great but also time consuming

Hope that helps !