I also just finished installing my Retrosound unit today. Well, technically I finished it 3 weeks ago, but then once I hooked it up I found out that it had a noisy preamp stage that created a lot of white noise. Called Retrosound up and they sent a replacement right away that had already been tested by them, no questions asked. It was great!
I love just about everything about it. It looks great (though definitely not stock) and fits perfectly in the dash. I can really dig all of the settings it has - not sure what the Custom radio has, but the Retrosound radio has a Loud/Not So Loud function, Fade function, L/R balance, Bass/Treble adjustment (especially important to me because I listen to a lot of heavy metal and like to hear the double bass rolling, but also listen to classic rock which I prefer more treble for), a gajillion radio presets and functions, and different music settings. It even has a function where it'll scan for a certain type of music playing on a radio station (rock, country, classical, etc.) and tune to that station for you! It's pretty ridiculous.
I really like the remote-mounted box with the SD reader / USB / Aux input too. I put mine in my glovebox and it's worked great there so far. I stuck an old CD player in my glovebox too in case my MP3 player stops working :lol:.
My only complaint about the Retrosound system is the Infini-mount bracket. Yeah, it's great because you can install the radio however you want, but it also means there are thousands of ways to have the radio stick out just a little too much, or be recessed by a fraction of an inch. I spent awhile taking my radio in and out of the dash and adjusting it a little bit each time so it fits just right. It could be that I just missed some essential part of the instructions where it tells you to measure a distance that will easily give you the right radio depth though
When it comes down to it, if you want something stock-looking, go with the Custom Autosound radio. If you want a really high quality radio that looks and sounds great, even if it doesn't look stock, go with the Retrosound. I'll try to post a picture of it installed in my car tomorrow so you can see how it looks.