I use a protein powder periodically just to make sure I'm getting enough. Right now I'm using the chocolate Vega brand. It has no sugar added and is made up of pea, potato, hemp, brown rice and cocoa and hazelnut flavours. Not sure if I really like it though because although it has no added sweeteners, it almost has a wee bit of an aspartame aftertaste. Vega is really a healthy brand and is the product of a vegan Ironman triathlete and two time Canadian 50K Ultra Marathon Champion named Brendan Brazier, who is also apparently one of North America's top nutrition experts. So you'd be getting bang for your buck, but like I said, I found the taste requires getting used to.
The good thing I guess is that if you use the Vega brand, because you are getting an assortment of different 'proteins', you would be getting the right mix of the various amino acids to give you a complete protein.
I suppose if you were adding vanilla flavoured to a fruit smoothie, you wouldn't even notice the protein powder.