http://seekingalpha.com/article/1496712-it-is-time-to-swap-your-preferred-stock-etf-into-this-preferred-stock-closed-end-fund?source=intbrokers_regular

Good article about another core holding of mine, PFF.

JTP looks pretty attractive.  PFF has the advantage of lower fees, no leverage (see my note about MHN) and higher liquidity.

JTP is trading at a nice discount and has a higher yield (though most of that is the leverage talking).  So depending on your feelings about leverage, it looks interesting as a swap for PFF based on the discount.  Please note though, that discounts can persist for long periods of time.