I'm consider buying one of these but would like to see if anyone has had any problems with them?
http://www.allseasonsfeeders.com/collections/protein-feeders/products/600lb-electric-protein-feeder

You are good to go. They make very reliable feeders.

Yes, works good and I recommend them. Did take a month for deer to get used to it. I set the timer for 5 am for 10 seconds and usually by dark the troughs are empty.
Less protein for the raccoons and deer will visit it all day long.

I just bought 1 of these because I have coons all over. Something still got in and disconnected the solar panel. Same price.

I have 4 of those corn feeders and only one out of four had the wire pulled loose from the solar panel. You will need to secure the wire in some fashion between the solar panel and the feeder. I used a self tapping screw and a wire tie down. The game camera shows the raccoons did it, I assume they were mad at me and did it on purpose.
Squirrels will be the biggest pain as the can get thru the grating to the spinner. I will replace my spinners with those spring loaded style in the future. But boy, you should see my herd of squirrels they are bigguns.
I put the corn shields on my feeders as well. Deflects the corn away from under the feeder and if you have hogs this will keep them from rooting up the dirt underneath the feeder.
I put all my feeders inside 32'x32' pens, because of the hogs.

I've had the timed protein feeder for about 6 weeks now.

Started with mix of Record Rack Golden Nuggets/corn and they came to it immediately. Not its on just regular Deer and Elk.

I originally had it on slow spin and it clogged up a bit, had to change it to medium speed and run it a few consecutive times and its working great again.

I have three and have had to them a long long time. They are very reliable and after years of use you might have to change out the controller panel which is a non issue. Very simple. There is a lot of junk out there but All Seasons is legit. One recommendation I would give is spend a little extra de the 12v solar panel. It's worth the money.

I have 2 of these feeders and they r great. if you cover the varmit welder wire with 1in poultry wire the squirlls will not get to anything. I also have hb 750 feeders and prefer them. they r all steel and shorter so easier to fill. good luck