I like staying on, the only problem is can you keep up with the protien,carbs,calories,fats that you have to eat as your getting bigger if your not able to increase your not going to grow, my theory is the longer your body has to adjust to your new gains in theory the easier it will keep them, also i dont like the idea of a single compound for that long i would add something like Eq(400,600mg) at week 7 and run it till week 19 and run post cycle therapy (pct) 2 weeks after last enanthate shot.