dbol was designed as simply an oral version of testosterone that aromatizes even more rapidly
since most of the muscle is made up of water it gives the impression that your muscles are 'gaining'.. but like anything else you can only gain a certain amount of actual muscle tissue which is far less than what people think
I have never run dbol without a test base, but I do like it. A lot of the size you gain is going to be water you will shed after your cycle, but if you run a decent PCT, you will have strength gains you keep.