Pros: Good test boost, slight increase in muscle mass, makes you arroused easily
Cons: Felt edgy first few days, increased erotic dreams, odd body odor
I've used this product for about two and a half weeks now (almost the full cycle), and have had mixed results as opposed to the Animal M Stak (Which I recommend over this product). I don't have the money to do all the stacking, but this product isn't bad all in all.
I found that I had an increase in erotic dreams, which at first was cool... but lead to plenty of sleepless nights, which ultimately affected my time at work, gym, and then recovery. I would seriously recommend taking care of business before bed so you can get a full 8 hours of sleep. Don't get me wrong though, you definitely feel like an animal after a few days of taking this supplement, which your girlfriend or wife would appreciate I'm sure.
I can't say it gave me a "boost" in the gym like the Animal M Stak, but I did notice that I was able to get more "cut" with this product, as well as maintaining beefier muscle tone for a longer period of time. I didn't notice an overall increase in reps or weight lifted in all honesty.
I found the vasodilators to be a bit of a bother honestly, more from the fact that I got headaches the first few days after taking the pills. Once my body adapted I was ok and functioned normally. Vasodilators have a pretty strong effect on me in general, so it may be different with other people.
I also noticed a slightly odd body odor after taking these pills, and it reminded me of junior high and going through puberty. I don't fully understand what it is directly linked too but I know I didn't have this odor when I took the Animal M Stak. I can only think it's due to the increase in test.
The other thing I noticed was in increase in aggression and overall irritability with people in general. Little things that wouldn't bother me before really started to set me off. It did help in the gym though, as that is where I was able to work off the aggression. The off days from the gym sucked, as I found myself unable to get the aggression out... as I found the best way was to push the weights.
All in all, after using Animal Stak 2 (AS2), as well as Animal M Stak. (AMS)... if you have the money to stak and use both, I seriously think you would gain some hardcore muscle mass. I also think your ability to lift more would increase by at least 3-4 reps +, as well as an increase of at least 10% to 15% of heaviest weight lifted for all reps. (i.e. an additional 10lbs for each rep if your max weight lifted for a given exercise is 100lbs... so instead of starting with 40lbs, you would start with 50lbs, etc. and work up from there.)
If you have to choose between AS2, and AMS... I would go with the AMS, mainly because I felt I had a better time of gaining muscle mass, increased weight lifted, as well as overall energy in the gym. Both are good products, and I wholeheartedly recommend both of them depending on your individual needs, etc.
For myself I think AMS is a more potent product which affected me a lot more physically vs. emotionally.