I have a Pequea 80P I bought new 10 years ago, and pretty well satisfied with it. The paint is holding up on it very well. The only issues I have/had with it are...
#1. On the front belt drive, the pulley on the pto shaft is not exactly lined up with the drive shaft going back to the beaters. With heavy loads, it would spit the belt off. I shimmed the bracket holding it, so as to align, and haven't had any problems since. I called the factory about it. The guy I spoke with went out in the lot to look at one, so as to see what I was talking about. All the while, telling me it SHOULD be in alignment, and was probably a fluke. After he found one and looked, I heard... " Well I'll be da*#ed, this one is that way too. Checked another, and the same way. I suggested he might want to mention it to someone, and get the problem solved. I checked an 80P a few years later at our County Fair, and pulley's were still out of alignment.
#2. The apron speed seems a little fast with heavy manure. It does have 2 speeds, and I have it set on the slowest. Being used to an older spreader with multiple apron speeds, other than 2, one more slower speed would be a great improvement. Not sure what other brands have.
#3. Mine has a single beater. My old one had multiple beaters. You don't get near the quality spread with a single. They do, or did offer multiple beaters, but was a, I believe over $600.00 option at the time.
Being I'm at different farm now with much flatter ground, I may try to find a good used larger spreader with multiple beaters. They seem to do a much better job shredding chunks, or gobs that come out of the storage bin.
For fluffy horse manure straight out of a stall, they do great, just don't load it higher than the beater at it highest point, in rotation. Anything higher than the beater will get dragged off in a big sheet, if using long stemmed straw for bedding. If using pine shavings, I'm sure it would do great.
If I had cattle, I'd definitely look for a farm rated spreader, like New Holland, etc.