Similac Alimentum Hypoallergenic Formula Review

My son who is 1 month now has been on 4 formulas since birth. First similac advantage, the their soy one, the enfamil gentlease now the doctor put him on similac alimentum. My son starting having bad gas all the time once we brought him home from the hospital. He did the worse on the soy formula then any of the other ones. He wasn't sleep well at all, he just cried in pain  all the time cause of the bad gas and his skin was so dry. I couldn't get him to eat but an 1 to 1 1/2oz of formula every 2 hours. He just didnt want it cause it hurt his little tummy so much. The doctor put him on alimentum almost 2 weeks ago and he is doing alot better. I found out tho. He does alot better on the ready to feed then the powder formula. The corn in the powder which is not in the ready to drink was hard on his tummy too. I love the ready to drink, no tummy aches. It is just a like costly tho. I did some research with my insurance company and found out my united healthcare insurance covers this formula under medically needy. I just had to find a medical supply store that carried it and could fill it as a medical claim. I called alot of medical supply store and finally found one that carries this formula and now i get it shipped in a monthly supple to our house each month. Its awesome.