I'm with Mooso.
I just switched from Poly to factory bushes last year.
The roads are a little rough where I live. I snapped two sway bar strap in 1000 miles with the poly bushes. I haven't snapped any since I changed to factory bushes.
The poly bushes are easier to remove though. If you do one a-arm at a time you can do it without removing any hubs, axles or ball-jounts. You can twist the poly bushes out with a pipe wrench - no pullers or large forces required. I fabricated a puller to pull the factory bushes in (just a bit threaded bar and a couple of sockets) I used lots of anti-rust wax to try to make the next change easier.
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