One of the things I dislike about this paper is the way in which the figures are presented and referenced.
Each figure, table, etc., should be labeled with a number and a caption, i.e., "FIG. Artists depiction of mass transfer between two gravitational wells.
gravwaves2This is a really good paper, so now lets trash it.
Seriously, I though it would be helpful for you if you could see a critique of this paper so that you could more easily see some of the things that were done right and that were done wrong. It is well organized, focused, and well polished (i.e., good grammar, good spelling, transitions between different discussions, etc.).
They give a description of what gravity waves are, a brief history of gravity waves, and a brief note as to why attempts to detect them are important. It contains, however, too much information in too little space.
If this were your paper, I'd recommend either expanding the size of the introduction, or, even better, tightening the focus and leaving out some information.
The sentence "As in any wave-like signal, a gravitational wave has a characteristic frequency and amplitude" conveys little information.
Worse, it interrupts the train of thought --- the sentences before and after really need to go together. If a wave "chirps," it can't be described by a single frequency or amplitude.
The third paragraph makes a transition from the introduction to the rest of the paper, telling us what they are going to discuss.
Unfortunately, they only mention one source of gravity waves, while their paper goes on to discuss other sources and other topics as well.