Relaxing, cool.
I thought something like this might get repetitive, at first. You know, only fifty seconds. and some guitar, but I just sat reading with this in the background for a little less than half an hour before I really realized it was a loop.
I really like the little, interesting distortions. The grindy, zappy noises that pop up regularly. And the pace of the song gets really balanced by the addition of the second guitar track halfway through.
One thing I think would improve the song, is to bring down the cymbal. It seems to come in just a little too loud, from my point of view. And if I had to complain about anything else, I'd say the transition from the end to the beginning of the loop is just a little bit sudden.
Other than that, I think you did a great job. I didn't at all mind the length of the loop, and it was all good and smooth. Keep it up.