Works great with iPhone
923234
This product works great for my iPhone.  I use my iPhone's Google Maps app as a GPS navigator now, so I don't need to pay for those ridiculously expensive GPS updates for my old GPS device.  I've only used this product attached to my windshield, so I don't know how any of the other accessories work.  But it's a great product, and it looks like it would work with a wide range of smartphones, in addition to the iPhone.
504396
I was reading some of the 1 star comments, and many of them were regarding incompatibility issues with the iphone.  I can't speak for the iphone 3g, but it works great with the 3gs.  The remote controls the volume, tracks, etc without any problems. it does not ask me to go into airplane mode.  Interestingly, it speakers charge my iphone much faster than when i plug it into my computer's usb port.

Overall, i'm happy with the unit.  It is simple and works.  The sound is pretty good, and represents a good value for your money.

Addendum (6/6/10)  I got this speaker when it was on sale from amazon for around $90.  The speakers still work great, and i'm very happy with them, but they're not worth $179.
4452986
I just received my speaker doc today.  I actually bought it through [...] for the same price.  I was a little nervous about buying this since some people had bad reviews about it not working with the iphone.  It works just fine with mine and my phone is only a month old. The speaker is very nice, it has kind of a rubbery texture to it which makes it really nice. You do have to take off the adapter piece if you are docking an iphone though but that's no big deal.  Sound is awesome and can get pretty loud. There is no interference with the iphone at all.  It is a little annoying that everytime you dock your iphone and the speaker is on it will ask if you want to put it in airplane mode; I wish there was a default NO button.  Other than those minor things it is well worth the money. It also comes with an audio out cable for use with mp3 players which is very nice.  If you are thinking about buying it you won't be let down.
3688713
Works very well with 2 iPhones or an iPad. I can really tell the difference in charging time. Much faster than with the conventional charging devices that typically come with the phones.
3843535
This headset works great with my iPhone 5.
I am able to answer phone calls and make phone calls by pressing the main button.
People I talk to report good quality.
The battery lasts a long time.
I love being able to ask Siri a question at any time.
I highly recommend it!
3901051
I bought this to use on a long auto trip to keep my iPhone charged as well as listen to podcasts over the FM radio.  Very flexible, yet held firmly in the lighter socket.  FM transmission worked great.  Occasional buzzing sound from iPhone 4 even when turned off.  Not sure why.  Screen message on iPhone says incompatible device when I plugged in the iPhone 4.  Yet, other the occasional buzzing, it worked great.  I did not try the hands free feature.

I would still recommend.
2665364
Works great with iPhone 3g and 3gs. Speaker reception sometimes gets a little fuzzy when speakers and dock are on opposite ends of the house. Otherwise, I love this. Good purchase. Worth the money.
1074054
Great works fine with my iPhone 5. No problems at all.
1445513
I unpacked the device, charged it, set up to work with my IPhone 5S and it works just great!!  I was very much surprised and recommend this product for the price, ease of set up and use and sound quality.
493981
The headphones are great! Getting them synced up to my phone was very easy. Great to have now that iPhones don't have a regular headphone jack. This way I can charge my phone and listen to music at the same time.
3902552
I got this because my daughter got some toys that were compatible with using an iPod or an iPhone. Since I didn't have an iPhone and my much older iPod is not longer in working condition I got this. I love it. It works great with the toys that she has and I use it for music when running.
661975
Works great. Sound quality is good for the price and only one device. Sound quality would be better is there were 2, 3 or 4 speakers. So, this is great. Easy connectivity with iPhone. Just hope you don't get a telephone call while listening to music, as this is the speaker and the microphone is in the phone, which is usually elsewhere!
3412476
Works great, just like the one I got with my iPhone.
4345390
Perfact and its a wifi printer,
Works great with my IPhone !
3446312
Works great with iphone6....only compatible (see that now) with iphones. Did not work at all with the two android phones I have but I really bought it for my daughter's iphone so I was happy with the purchase.
4220230
Easy to use and works with iPhones.  Many other cover the on-off button at the bottom center.
1153558
These work great! I bought a few; I keep one in the car, and one at work. Everywhere I want to listen to my iPhone with headphones. This is a great way to use the iPhone you've got, before the upgrade which will probably happen in a few weeks.