@ layers, no should be fine.
What I am doing is selecting 2 or more verticies and scaling them in one direction. This little trick basicly lines them up.
Try it yourself, make a plane, grab the top 2 verticies and scale it down. If you keep scaling the verticies will be at the same spot (or very close to the same spot).
You can also use it to make the line between 2 verticies completley horisontal or vertical which I do when shaping the side walls of the staircase.

You can also use view align on a 2d view, but scaling is faster.