Lending a set to PSA - any reason not to?

A friend of mine was asked to loan a set for display at the Long Beach Expo. It seems like fun and PSA insures everything. Anyone ever do this?
To bigdcards: "you are right" - cpamike "That is correct" -grote15
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I would
1948-76 Topps FB Sets
FB & BB HOF Player sets
1948-1993 NY Yankee Team Sets
circumstances such as when they shuttered the Mickey Mantle restaurant a couple of years ago. I'm sure this article
was mentioned on this forum back then but it a good reminder of what can happen if you lend your things out.
Mantle Restaurant