First what I don’t like:This is really about the main application setup that is initially recommended with the unit – “Torque” not the unit (ATOTO AC-4450).I could see Torque is preinstalled on the ATOTO A6PF Android Double-DIN Car Stereo, but the instructions talk about installing it on your phone first, so I thought this was part of the setup/install piece – note you don’t need to as I realized after a few attempts.Then after trying to follow the instructions, you realize that it’s for an android phone only (I have a apple phone). The Apple store has so many different app’s named "Torque" from different software vendors 🙄.To be honest I didn’t try any other apps I just wanted to be able to have a dashboard with dials of several the major sensor outputs, other than the standard Speed, Rev’s etc. and when needed to run a diagnostic on any issues/errors.Next is minor, remember you must connect it twice – first with the head unit with Bluetooth.Then second with the app. It took me a while to click 😉. I believe this is because Torque the app can link in different ways on multiple difference devices.What I do like:It’s smaller than any other of my OBDII Diagnostic Scanners I have used.Slots in with no issues.After setup performs perfectly.The price is very reasonable.I would recommend this as a nice module add-on to the head Unit (ATOTO A6PF Double-DIN)I’ve only had the head Unit & ATOTO AC-4450 installed for 2 weeks, time will tell, if something drastically changes, I will update the review.

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 It is user friendly and simple to set up. I am happy that I don't have purchase individual gauges to get installed in my 2005 G35 Coupe 🤓

Simple and easy to use!! Works every time, and the s8 is much more convenient to quickly clear codes. It must be unplugged when not in use, but it is much easier to plug this into the obd2 port and use the s8 than it is to dig out my code reader with long cable and then return my code reader to storage case.

First what I don’t like:This is really about the main application setup that is initially recommended with the unit – “Torque” not the unit (ATOTO AC-4450).I could see Torque is preinstalled on the ATOTO A6PF Android Double-DIN Car Stereo, but the instructions talk about installing it on your phone first, so I thought this was part of the setup/install piece – note you don’t need to as I realized after a few attempts.Then after trying to follow the instructions, you realize that it’s for an android phone only (I have a apple phone). The Apple store has so many different app’s named "Torque" from different software vendors 🙄.To be honest I didn’t try any other apps I just wanted to be able to have a dashboard with dials of several the major sensor outputs, other than the standard Speed, Rev’s etc. and when needed to run a diagnostic on any issues/errors.Next is minor, remember you must connect it twice – first with the head unit with Bluetooth.Then second with the app. It took me a while to click 😉. I believe this is because Torque the app can link in different ways on multiple difference devices.What I do like:It’s smaller than any other of my OBDII Diagnostic Scanners I have used.Slots in with no issues.After setup performs perfectly.The price is very reasonable.I would recommend this as a nice module add-on to the head Unit (ATOTO A6PF Double-DIN)I’ve only had the head Unit & ATOTO AC-4450 installed for 2 weeks, time will tell, if something drastically changes, I will update the review.

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 It is user friendly and simple to set up. I am happy that I don't have purchase individual gauges to get installed in my 2005 G35 Coupe 🤓