Original vs. Modern Prints

One of the barriers that people might find in using historical sources is the notation. Things like different clefs as well as simply the style of notation can throw people off. It is definitely something to get used to and your skill will only get better by actually doing it.

One major perk I see playing from original prints is that it can sometimes convey a better sense of the musical expression. Compare these two prints of Hotteterre's G minor prelude. Notice how the slurs are notated differently - we get a better sense of the motion of the notes in the original print (top example) instead of a slur that just stays "neutrally" above. Also look at how some notes are barred together - they give us, I feel, a better visual indication of voicing (lower vs. higher), and those curvy bars just reflect a little nicer the fluidity and elegance of the music compared to the straight ones. The steeper or sometimes curvy barring also show the hierarchy and ornamental aspect of the notes better. In comparison, the broader, less steep modern notation gives the impression that all notes are equally important. 
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There are advantages to using both, especially when modern editions sometimes come with some background information which can be really helpful. In any case, always take your time with the music and enjoy your own discoveries in every piece, in every musical landscape.