I have tried Red Bull and I like it. I bought it this weekend and drank one 30 minutes before I did my treadmill work out. It boosted my endurance level. I drank one this morning along with breakfast before going to work. Here it is the afternoon and I still feel energized.   I bought a case (24 cans) of Red Bull for $31.00 at a BJ store. It comes out to $1.30 a can. I think it is a good investment. I would drink no more than 1 to 2 cans a day. It gave me a great energy boost.