Get the Stanley Bostitch
. it's the industry standard and is bullet-proof. You'll also find staples / cleats ANYWHERE, where some of the no-name brands have harder to find staples.
Speaking from experience, the last thing you want to do is fumble with a crappy flooring nailer. You REALLY don't want to be pulling up boards that are half nailed in. Trust me on this
Like LazMan said, Bamboo is one of the hardest/densest flooring materials. You simply can't skimp on the equipment here. Powerful enough compressor & a quality nail gun.
I agree that unless you're planning to do more hardwood down the road, renting is a better choice (providing you can complete the job in a couple days).--
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