I own the Motorola T505 and the Jabra Cruiser2. It made sense to me to take a little road test and compare the two bluetooth speakerphones in an effort to determine which one is better. With my mom on the other end, I took to the local freeways and switched back and forth between the two units while mom told me what she was hearing on her end of the conversation.
Form: The Jabra Cruiser2 is attractive. It is lightweight but has a solid feel to it. Controls are simple to use and understand. The unit's design is understated and minimalist. A clip holds the Cruiser2 to your car's sun visor. Unfortunately, the Jabra's clip cannot be reversed. My car, an Audi, has sun visors that flip from front to rear, rather than the usual rear to front configuration. That means that I cannot use the Jabra Cruiser2 unless I mount it backwards. Conversely, the Motorola T505's clip allows the unit to be reversed, which gives one more mounting flexibility.
Setup: Pairing the Jabra Cruiser2 was quick and simple. A woman with a pleasant voice provides pairing instructions and also tells you quite clearly what's going on with the unit. My cell phone is a Palm Treo 755p, which was the model that came out just before the Palm Pre. For whatever reason, the Cruiser2 is apparently unable to download the directory from my phone. So when a call comes in, it simply announces the number rather than the name of the caller. I'm guessing this won't be a problem for most, as it's probably a simple incompatability between my cell phone and the Cruiser2.
Function: I used both the Jabra and Motorola units by listening through the internal speaker and I also used the FM transmitter function. The sound quality of the Jabra Cruiser2 is superior to the audio quality of the Motorola T505 when using its internal speaker. It's internal speaker seems to be larger, clearer and has a better volume output than the Motorolas.
According to mom, the microphone quality was similar between the two units. However, she felt that the Jabra's audio output was more "choppy" than the Motorola's.
When I use a bluetooth speakerphone, I usually set it to output to FM stereo. It is there that the Motorola has a clear advantage over the Jabra. I heard consistent background noise and static from the Jabra Cruiser2 where much less interference was heard from the Motorola T505. Several times, FM radio stations overpowered the Jabra's FM output. Yes, I clearly understand that the goal is to operate on a frequency where no FM station is broadcasting and I tried to do that. But the Jabra's FM transmitter did not seem up to the task. I'd rate it poorly with respect to it's FM output function.
Conclusion: There are things to like about the Jabra Cruiser2 and things not to like. It's appearance is sharp, setup is a breeze, and it's simple to operate. Audio quality and volume using the internal speaker is clear and relatively loud. But I'm frankly quite unhappy with the FM output of this unit.
I was torn as to whether to rate this unit 2 stars or 3 but I gave Jabra the benefit of the doubt with a 3 star rating. However, I don't expect to use the Cruiser2 much, if at all, because the poor FM transmitter is a deal breaker to me. So, if you're planning on using the Cruiser2 by utilizing its internal speaker, I think that you'll be satisfied with its performance. If you want to listen to calls and music using your car's stereo speakers, I'd skip this unit and instead consider the Motorola or a different bluetooth speakerphone with stronger FM output.