[John Hutchcraft]

Examples of good syllabics abound. To the Plath and Dylan Thomas already mentioned I would add, respectively, "Metaphors" and "Fern Hill," the latter being arguably one of the signal poems of the twentieth century.

Richard Wilbur's rhymed haiku are syllabic.

And then there is nearly all of Marianne Moore's body of work.

Say what you will about syllabics, but it seems pretty tough to make the case that their use is any significant impediment to writing a good poem - if, that is, you've got a good poem to write in the first place.