Very pleased with this product!
I am so pleased with this product, That I bought two more for a couple of friends.

Great little mp3/xm receiver/recorder for the money!
I bought this for my husband for Christmas and he's been thrilled with it so far! He'd asked for an mp3 player and I wanted to get him a good one, but when I started researching and discovered that he could have both an XM radio receiver for his car and an mp3 player, I was sold. NOTE: You have to buy the car kit separately -- I got one through Amazon for $50. I was just about ready to purchase the Pioneer version, which was running about $180, when I found this one on sale for $40! As noted in other reviews, recording from XM has some minor irritations, such as sometimes getting the last few seconds of a previous song/interview before the thing you want to record and sometimes the last seconds of your song/interview get cut off, but hubby says the fact that you can start recording something up to 45 seconds after it starts and get the whole thing makes up for it. Works great as an XM receiver and the FM modulator works well, too. Remote buttons sometimes don't work and it has the annoying habit of turning on when you drop it in its cradle, but my husband has been happy with it overall. Great 3-in-1 device for the price!

I'm really happy with this thing
I like it! This is my second XM radio. Thought I would share some thoughts about this gizmo. First became aware of this particular radio several weeks ago - saw an ad for one in the local newspaper (one of the big name department stores after-Christmas sales). Price was what initially caught my eye (about the same as what I paid here at Amazon). Almost didn't buy this as from what I read about it seemed to say that you had to sign up with Napster and XM. Turns out you don't have to sign up with Napster.

Highlights of my initial experiences so far:

What was in the `box': radio + battery, earbuds, dock/cradle unit, power transformer, XM antenna, remote control, soft plastic carrying case/holster, RCA audio cable, USB cable, and Instructions / software CD (Napster)

First thing I noticed was that the antenna / power transformer was the same as my existing XM radio (roady xt), so I quickly disconnected my one radio's cradle and hooked up this new one. Popped the battery into the radio and was good to go.

Setting up a second account on the XM site was a matter of a couple mouse clicks and in ten minutes the radio was active (course that cost another $100 or so).

Figuring out how to use the radio was a snap. Menu system is very intuitive. The remote for this unit is almost the exact copy of the one for my other radio - the old remote even worked with this new unit.

Now for what this gizmo does. Well for one it lets you listen to XM radio (duh), but it also lets you record XM radio. Think of this device as an audio VCR. When listening to the radio - you can record the song you are currently listening to simply by pressing the record button on the remote - the unit records just the one song and records the title / artist information too. You can also record the whole channel as well if you want - and each song recorded during that session is a separate item - each with it own title that you can scroll though. And like a VCR, you can set the unit to come on at a certain time / date and record a program / channel.

You can also load your own audio files (MP3s) - either via the Napster software or directly. Like a lot of MP3 players, when you hook the unit up to your computer via the USB cable - it appears as a drive. Just be aware that the unit comes with the memory partitioned into two separate areas - one for the XM content and one for music files (MP3s). The unit I bought was the 25 which has a total of 512MB of memory - out of the box this is split 50/50 with 256MB (half) available for MP3s, the other half holds about 12.5 hours of recorded XM content. You can reconfigure the percentages, and even make it 100% XM (for 25 hours of space for recorded content).

Disconnecting the player from the base disconnects it from the XM antenna - so you don't get to access `live' XM radio - just the stuff that you recorded and whatever MP3 files you have loaded. The player has its own rechargeable battery and I used mine today at work all day long and the battery indicator only dropped a little bit. Player charges while in the base.

All in all, I'm really happy with this thing.

One thing to know before you buy......
You must have a window that faces south in order to receive a signal. I live in an apartment that has windows only facing north and east and I can not get a signal and therefore this product is worthless to me. So check to make sure you have access to a south window or somewhere to mount the antenna to face south that also is not blocked by trees or tall structures. Good Luck!

Inexpensive and works.
This receiver was dirt cheap for my 3rd xm radio, mounted it on my motorcyle using ram mounts. Worked flawlessly on my last trip of 1800 miles. I have a Delphi and Pioneer so I find the needed passport module a little odd in that it creates xtra bulk when mounting in vehicles.
One reviewer wrote that the nexus cuts off songs you have recorded, leaving space between songs, this is very true and somewhat annoying!
But for the money I can live with it. Car kits are expensive so shop e-bay for deals!!