I've had the R15 for a few months now. Among the other selling points, I really wanted the bluetooth feature. I was so bummed to also hear the cruddy audio, not garbled, just really crappy audio and even at its highest volume it was often not loud enough. Bluetooth technology has been around a long time, not sure how they could screw it up so badly given the plug and play chips these days?? The speaker audio is also lacking sufficient volume for some outdoor environments. I have a number of other hand held radios (e.g. Yaesu VX6R) that produce twice the level of audio and much clearer. Of course inside or even in an auto with an external speaker, it's fine.
Another annoyance is the soft glass used for the display. Even with the most careful handling, the screen will show minor abrasions. I would have expected quality glass, like gorilla glass, for the price point of the R15.
As to the software, I have been using RT Systems for ham radio equipment since they first rolled open their garage door. So I immediately bought the RT Systems software for the R15, thinking I would have my radio programmed in 10 or 15 minutes. Nope. As others have said, their software does not allow import from all of the RR database (at least in a manner that it is usable). It's as though they started software development and then quit? The benefit of RT Systems is the ease of downloading from the RR database and very easily exporting it to the R15 without having to fiddle with the micro SD card at all.
So then I bought the Butel software. A few more steps are involved, but at least Butel can import and export from the RR database onto the micro SD card without issue. I strongly vote for the Butel software unless you enjoy always manipulating Excel spreadsheet files, figuring out comma delimited this and that and doing the hokey-pokey.
When I am indoors I connect an external antenna using small RG316 cable to SMA connector. The radio has amazing sensitivity and selectivity.
At the end of the day, I'm glad to have purchased the R15 as compared to similar hind on the market.