I've probably received more questions about protein powder than any other thing of anything in all of life. Protein supplementation is such a common, fundamental and routine component of everyone's diet now that it's not even really considered a supplement anymore. This is in good health though.
Note that the words "in good health" weren't supposed to mean anything, so don't think they're transposable with "fantastic."
I wanted to say that the normalized, routine use of protein powder was "fine" but I didn't like how simple and overly monosyllabic it sounded. So I grabbed a thesaurus and opened up to the word "fine." "In good health" was the synonym.
Thus, having protein powder is in good health. Not fantastic, but fine. It won't hurt you unless you do something weird with it. And again, providing your use of it isn't weird, it may also help you. Plus it's cheap. You can't even count the total number of manufacturers, making it a likely contestant as the single most oversaturated market in the world. That's good for you and cheapness.
And here's the deal: stop asking me about what kind of protein powder to take and just buy whatever you want. The type of protein doesn't matter that
much considering it doesn't really work like you think it does. As far as science and medicine have advanced, protein remains our safest and most natural mechanism to alter the hormone releases associated with your growth and suppress the cortisol release associated with your workouts. These are probably good things for your goals.
By no means will you ever need 300 grams of protein in a day to rebuild and regenerate damaged body tissues attributed to your weight training routine. Understand that. Anyone who says otherwise is lying or doesn't understand physiology or legitimate nutrition. There's no amount of squatting and benching that could cause your damaged muscle tissue to require that amount of protein. However, that amount, taken in appropriate timing might offer some hormonal advantages while providing way, way more than what you need for tissue repair. Within that massive, massive amount is the actual amount you need though. So as I said earlier, excess protein won't hinder your goals, and would possibly/probably help.
Taking protein for this reason in powder form is just the easiest way of getting it in. This is why protein powder is fine and/or fantastic. For $20, you can get a good bucket of whey. You can take it more routinely during the day, mix it in your pancakes, whatever you want. It's easy, cheap, and usually pretty convenient. So I'm all for it. But realize that the crazy expensive ones aren't really better. Paying $90 for five ultra-filtered ion-exchange bonded peptide pounds isn't helping you any more. But $20 for a bucket of whey is a good investment. Go forth and invest away.