I use air mattresses for camping. This pump is way too big to fit in backpack! besides, it takes me 150 pumps to fill a coleman queen size mattress.

For what it is, is not that bad. I understand it can't be smaller, or it would take longer to inflate a mattress. And it can't be faster, since it already inflates twice with every pump. But you can get an electrical-rechargeable pump (same brand) for less than 25 dollars.

This pump works well - short size makes you hunch over - can take up to 10 minutes to inflate a queen size mattress.

I bought the pump thinking it would be a great alternative to the battery operated pump...man was I wrong. It works really well, but being bent over to pump so long really killed my back. It's great for home use or car camping, but for primitive or hike ins, I think I'll invest in the battery operated pump. That said...the pump does work well.

This product is a bit puzzling. i got this product today, and the picture on the sides of the box show the product (black) that was actually in the box, the front shows a product (forest green) that has the two inflow/outflow faucets side-by-side on the top base of the pump, and the Amazon pic (black) shows another pump that that has one faucet on the top base and one faucet on the bottom base. It does say on the box (on all sides) that "Product design may vary." (see submitted pics)

The one that I received has the in/out openings in the middle of the handle, so right between where your thumbs would be. This means that every time you pump, the hose also moves up and down with it. Not a very good design. Mine also did not have foam (as the Amazon pic seems to have) on the handlebar.

I specifically got this pump as an alternative to the pump that came with the Greatland Air Bed with Pump - Blue (Queen), which is rechargeable, but must be charged prior to use - it canNOT be used WHILE charging, which means that you have to plan about 3-4 hours ahead at least, for it to charge enough to inflate a queen sized bed.

The problem is that the adapters that are included with this Coleman pump do not have one that will fit the Target bed. I was somewhat misled when I saw on Amazon that some people who bought the Target brand beds also bought this pump, leading me to believe that it was compatible. The largest diameter (basically without using any of the adapters) that this pump can fit into is 1". The Target bed has an inner diameter of 1 1/4". I ended up getting a vinyl tube, with inner diameter 1" and outer diameter 1 1/4" and it does an OK job of fitting my Target beds.

I can sympathize with some of the other reviewers when they say that this pump is very difficult to use -- just consider, that the smaller the opening/tube/hole, the harder it is to pump, right? I used this pump to pump up my twin and queen Target air beds, (so, an inner diameter of 1") and it wasn't all that easy. Not enough to break a sweat, but not exactly a walk in the park (for reference, I'm about 6', 200 pounds, fairly fit). The adapters included range from 1/8" to 9/16," and you'll be straining a lot more when you use these.

Timewise, the rechargeable pump (so, battery-powered) that came with the bed can inflate a twin in about 30 sec. I have another electric pump that runs off 120V, and it inflates it in 15 sec. The pump takes me about a minute.

The pump itself is made of fairly rugged plastic, and should last. It's not a smooth operating machine like other pumps that are more for high pressure/low volume. There will be some leakage and lack of efficiency. So even if it does leak a little over time, it should still do the job of inflating low pressure/high volume inflatables.

This pump is worth every penny. I can inflate a Coleman air mattress with a fraction of the time and sweat required to use one of the standard foot pumps. Ever notice that once you use an air mattress and then deflate it, it can never be packed in as compact a space as the box in which it came? This pump can also be used when packing up the air mattress. The pump will suck all the air out of the mattress and make it easier to fold up and store in the same compact size as when it was new. If you are going camping and planning to use an air mattress, this is the pump you want. The 12v plug in pumps are fine if you have a place to plug it in that is no further from where the air mattress will be than the length of the cord. This pump eliminates that problem and is almost as fast.