The difference between testosterone suspension and other types of testosterones such as testosterone propionate or enanthate is that the testosterone suspension is suspended in water while other were suspended in oil. It is preferred by only advanced bodybuilders because it would be painful to use it if it is your first steroid experience.
Testosterone suspension has no ester attached which is a case for other forms such as testosterone propionate. This purity makes it effective immediately once it has been taken. In other word, it has no half time in the conventional meaning. Therefore users of this drug must have relatively frequent injection schedules such as at least once a day. Two or three times injection a day is also considered as effective for such sufficient resutl by mist of bodybuilders.
In case of gaining strength and muscle mass, testosterone suspension has identical beneficial effects with other form of testosterones; however, due to its form of being ester free it is much more effective than other forms compared to mg to mg basis. Furthermore, it provides advantages on detectability because of the ester free forming that provides to get rid of the evidence of steroid usage. That makes it more popular among tested athletes.
On the other hand Testosterone Supension has potential adverse effects on the body as other testosterones has. These are in many ways easy to control. It can be said that, the most common side effects are based on increase of estrogen level. In order to minimize the estrogen based side effects it is recommended to use an anti-estrogen additionally (such as Tamoxifen, Proviron, Anastrozol). In addition to estrogen based effects, Testosterone Cypionate has DHT (dihydrotestosterone) related effects such as hair loss, decreased sperm count, acne.