I purchased this unit about 8 months ago, and generally it's been fine -- easy to use (I truly appreciate the manual volume knob), battery lasts long -- a great help in using my phone as a navigation system (though I do not usually do phone calls in the car). As a side note, I had a problem with the speaker failing (the bluetooth/etc all worked) and I contacted support -- they were friendly, and expedient - within a couple of weeks I had the new unit in my hand. +1 for good support of a solid product.

Had 2 older cars without bluetooth capability. This allows me to move from one vehicle to the other without having to buy a separate unit for both cars. I purchased a simple GPS holder and with minor modification was able to hold this firmly on either dash. I was impressed with the sound quality and ease of connecting. Having the capability to replace the battery was also a selling point for me. For the money spent, I am extremely happy with my choice.

I put this on my visor in my big work truck and it works great. Tells you when you are connected to the unit and works very well for callers to hear you and you can hear them.

UPDATED 7/31-

My original review skewered this device (see below). However, Avantree has been good to work with and willingly replaced what appears to have been a defective device. The replacement no longer suffers from the audio dropouts, and the good qualities (loud, multipoint connections, and volume knob) are still good. I do still occasionally experience a disconnect or two when connected to devices that were rock solid on my now-failing Moto Roadster, and hence I'm upping to 4 stars rather than 5. Ultimately, it's a fair bargain for the price, and it impacts me far less since I've gotten a newer car in the interim (and scaled the older one and this speakerphone) down to my son. He uses it and has reported no issues.

ORIGINAL REVIEW BELOW (n/a on replacement device so far)

I've held off because I really hate writing negative reviews, but I can hold it in no longer. It's entirely possible that I just have a bad individual unit, but I have seldom been so frustrated at a gadget as I have with this one. I bought it to replace an aging Moto Roadster 2 whose battery is starting to become a problem. My intended use case is for the odd en-route conference call but more often for on the road podcast listening in my older car. The Moto has served admirably in that role for years.

First the good... The speaker is plenty loud & great for podcast & audiobook listening. It pairs with two devices simultaneously. I like the volume adjustment mechanism. The battery life has been great.

Now the problem... None of the above matters if the device doesn't work consistently. No matter what device(s) I have connected, it will randomly disconnect/connect while in use. More frustrating is that while streaming audio, it will simply go silent. It doesn't disconnect and stop then but rather keeps "playing" on the source device. This means that I miss chunks of audio. Sometimes stopping audio on the source and starting again fixes it temporarily. Sometimes I have to dis-/reconnect. Sometimes power cycling works. The one consistent behavior is that it ALWAYS does this on every trip now independent of the source (have tried Galaxy S10 and s10+, iPhone 8, Galaxy Note 9, and LG V35). I lose calls, can't stream audio consistently, and end out endangering lives messing with it. I've resorted to just using the phone's speaker at max volume. I've reset the device entirely and repaired the devices. Nothing fixes it. I considered chucking it out the window, but I need to see if warranty service is possible. The results of that effort will determine whether or not I revise this review. For now, but at your own risk.

Solves the problem of bluetooth phone reception in my car and Avantree promptly sent me a new part two years after purchase