For 350.00 New it is hard to beat an Abetta, which is American Made.
They are very plain, no frills.
They use Raldie Trees, one of the strongest on the market, the are limited in what size and type of Horse they will fit, but they do have a decent selection of Types of Trees, of course this is true with many Brands.....
Some say they are comfortable some say they are not, this again can be true with any New Saddle, especially if they are under 700.00
I personally have had an Abetta that was 17 years old and one that was 14 years old, they both were used on lesson Horses and also for general riding, they have been swimming and rolled on. They are ragged now and have a few rips in the Cordura, nothing that would make them unsafe.
Are Bighorn, Fabtron and a few others better? For some people yes, for others no.
Since you are looking at it from someone you know, try it out, if it fits your Horse and you are comfortable riding in it, then buy it, for a few hundred dollars you cannot go wrong if it meets those 2 key tests