BBOZ = Buy and sold, not buy and hold. The ETF fee gets funneled through the spreads as time decay. It is not an exact science but they claim to "try" to match the appropriate amount of futures contracts to demand, it's more often 2.1x not 2.5x from my limited experience with it. Recommend you read their disclaimer. I don't watch it anymore but short the cash market directly so I can close overnight if there's a bull stampede or good profit. Nothing worse than watching a winning trade disappear then gap against you on the open.
No real reason not to use it, plenty here do and effectively. It gaps around so make sure to fight for price. If you have stocks that need protecting these products are good short term hedges.
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