Re: "of benefit" vs "beneficial"
"Of benefit" is useful when you want to use the degree "of some benefit". It's difficult to put across the same thing using "beneficial". You can try "slightly beneficial" but that might be too low a degree, "quite beneficial" but people's understanding of "quite" can differ widely, or "fairly beneficial" but again, it sounds unnatural. While "of some benefit" doesn't tell you exactly how beneficial it is, it's a useful phrase.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.