I have a love/hate relationship with my Garmin Edge 130.
First, the Garmin ANT sensors (speed and cadence) are absolutely elegant! They install in minutes with no tools and they just work.
My Garmin computer itself, I'm not so happy with. First, right out of the box, it insisted on a software update, which it crashed in the middle of! With the computer locked up I could find no way to power it down, so I just had to set it aside until the battery ran flat. On the second try, after a recharge, I was able to update the software and the computer seemed operable.
Setting up the computer for use isn't so intuitive that you should expect to do without the manual, which you will have to search for in the Internet because Garmin fails to provide it! Still, the setup process was straightforward given proper instructions.
Then I got to try it on a real ride DISAPPOINTMENT! My Edge 130 insisted on randomly shutting itself off while I was riding. I evaluated this over several rides, and went through my settings looking for something that would cause the behavior. I never did find any error, but this is obviously an issue that others have complained about, because in an obscure Garmin web document I found that a setting had been added in the latest firmware to disable Auto Power Down. So far, I think this has put a band-aid on the problem, at the expense of eliminating the auto power down feature. Now I must ensure that I turn off the computer before I park my bike, or the battery will run flat! (more on this later) But at least my computer is now tolerably usable.
I bought this computer because of it's compact form factor and because I needed ANT capability for my power measuring hub, not because I need a complex computer. (All my routes are burned into my brain, and I have no need for the Garmin navigation features.) My other bikes have wired Cateye computers that just work, they never must be turned on or off, never need charging, and work without fuss. All they ask is a new disposable battery every few years. In contrast, the Garmin must be turned on and off for every ride, a surprisingly complex process that takes several clicks through several screens for either on or off. The tiny Garmin battery is only good for a few hours, and the unfortunate rear position of the charging socket makes it unlikely that you will be able to charge it without removing the computer from its mount. So how would you use it on a long-distance ride?
So would I buy my Garmin 130 again? Well probably yes, but only because it's the most compact ANT-capable bike computer that I've been able to find. All-in-all I don't think that the firmware on it is truly stable, but it is (mostly) doing the job that I needed done.
As far as features, accuracy and screen sharpness this unit is definitely a step up from old Edge 500 - and in a slightly smaller form factor.
The one big drawback is battery life. Garmin claims 15 hours, but I could only see possibly getting near that if you have no speedcadenceHRM linked to it, no BT phone connection and using GPS only (no Glonass or Galileo). In addition, cold weather severely reduces the battery life - normally I'm able to get 8 hours of uptime, but when the tempurature goes down to at or near freezing, my unit consistently dies after 2.5 hours.
Like the size, battery life, and menu selections, especially the ride history. However for the senior rider who needs reading glasses but doesn't like riding with them, the smaller display can be difficult to read.