Product review (5 stars): Quality washer, respectable capacity, easy on clothes!
This washer fills a very important niche, and does it well.  If your home is not outfitted with hookups (or doesn't allow washers), this is great model to consider for the following reasons:

1.  Quality build
I had a Haier before this, and I honestly didn't trust it very much.  I really think you get what you pay for, and with this one I can set and forget with confidence.  Of course, it is more expensive than other models, but considering the premium you would have to pay to get an apartment already fitted with hookups, you may still be saving money in the longrun.

2.  Great faucet adapter fitting
First, don't make the mistake I did when setting up.  The adapter has threads on both the outside and inside to accommodate basically any faucet aerator connection.  I didn't notice the inside threads because there is a double rubber washer covering it.  Take the upper rubber washer out to expose the inner threads!  I felt very embarrassed at the hardware store when looking for another adapter.  It turns out I didn't need one!

The adapter has a water bypass switch.  Just push the red button and it allows water to flow thru the bottom.  You can use this to test water temperature, or to otherwise use the sink while running a load.  Great idea!  The faucet adapter also houses the drain so that you basically have just one connection to worry about if you're hooking up and detaching frequently (like I am).  The ridge connection to the faucet ensures that the drain cannot slip out and end up on the floor (happened with my Haier once.)  Also, it allows the release of line pressure so there isn't an explosion of water every time you disconnect.

3.  Reasonably quiet
I've heard quieter washers (like the ones in Japan, where all you hear is the swish of water, like a river is washing your clothes), but this one isn't terribly loud.  Basically a rhythmic hum during the wash cycle and you can guess what spin sounds like.  I did some tests from outside my apartment, it can be faintly heard on the other side of the wall, but I don't think I'd notice it if I wasn't intentionally listening for it.  It can definitely be quieter, but was satisfied with the sound level.  (My complex doesn't allow washers so I have to be very sensitive to this issue).

4.  BIG, but portable
The washer is big (nearly full sized).  I consider this washer to really be the upper limit of capacity for an apartment-type portable.  My previous Haier was pathetically small.  Although it scared me when they delivered it, (OMG this box is big!) it is surprisingly light (only about 100lbs).  The casters are fairly decent for rolling front and back.  I think GE should improve the casters to make it easier to change angles.  After all, being a "portable" implies that it should move easier.

5.  Other
Agitator-less: I think this is a necessity for all portables space saving purposes.  However, it also has the benefit of being much easier on clothes.
Reasonably energy-efficient
Easy to setup

Overall, I'm very happy with the washer.  It's been enormously convenient, and much more pleasant than using public laundry facilities.  I would definitely purchase again!  As my impression develops with use, I will update this review.  For now I give it 4 stars, but as I've only had for 1 month, I would like to use it longer before giving it a 5th star.  If it continues to serve me as it has without problems, it very well could achieve it.

UPDATE 12/7/2013:
Still very happy with the washer, and glad I got it!  It's been almost 6months and not one problem.  I still think the casters could be improved more, but it hasn't been too hard to move.  The water level does seem parsimonious, (consistent with other reviewers' experience), but I trust expertise at GE as they know alot more about washers than I ever will.

I will update again if the situation should change but I'm giving this washer it's 5th star.  It's simply the best out there for washer-less apartments!