I love Deca. It is my favourite way before Winny and Primo. I did a cycle of 50mg once a week first time round and have just started a second cycle of it. Initially, first cycle I got some acne and slightly swollen clit, but nothing else other than great strength and good size gains. Have a good 5 or so years of training behind me before I tried it though - think that would definitely help in being able to benefit from it.
I went off to let my skin get better cause I got some acne on my chest which I'd never had before and didn't like. And as I'd already made good gains in 6-7 weeks approx I didn't mind taking a break.
Well anyway I had a couple of months off it and didn't lose ANY of the gains and then decided to go on it again cause the acne cleared up almost completely. I decided to go 50mg every 10 days to start off with to try and minimise the initial sides. I have just increased to once a week again (after about 5 weeks) and the sides are very minimal. No acne and as for the voice, I've always had a pretty deep voice and I keep asking my sister if it's getting any deeper and she can't tell any difference. Me neither.
I'm having a great time with Deca and would recommend it if you are 100% serious about making some solid gains. Watch the sides though because it's a long acting drug. Go off straight away if you get sides you are uncomfortable with.