Are you a beginner steroid user or just a beginner deca user? Deca's probably not a good choice for a first time user. I have actually cycled both deca and NPP, Deca I ran at 50mg/week for 8 weeks, and NPP I ran at 25mg E3D for around the same time. To be honest the side effects for me were roughly the same for both, slightly scratchy voice at the end and one or two hairs sprouting on my chin which I promptly zapped off. Total dosage (as in per week) is more important than the ester used when considering side effects. However the problem is IF you do get sides with deca you'll have to ride them out for a few weeks because of the long ester, although thats also true for primo enth and women use that quite a lot. NPP is a better choice for sure, but at a dose like 25mg per week of deca I'd actually be surprised if you ran into really devastating side effects.