I've never owned one. But you already know the reputation of HK. From the pic it looks like the standard AR setup. So, from a survivalist perspective I would be asking about parts availability and interchangeability.
Other than that, is it a good weapon? I can't see HK putting junk on the market. I can build a really great rifle that is dependable and features things like a cold hammer forged chrome bore barrel, nickel boron bolt and a Geissele trigger with decent sights for just over half the price of that HK. The difference would be that the HK will probably be a shade more accurate.
Then again, most quality built rifles have an accuracy potential greater than most casual shooters are capable of. Should you buy it? That depends upon why you're buying it and, more importantly how you plan to employ it. In any event, in about two to three years, Uncle Scam will be wanting you to fork it over.
A small edit here: Unless you have a lot of patience, do not do business with PSA. They have the worst customer service in the firearms industry and they are damn proud of it. I got a defective upper from them once and it took five months to get the issue resolved. Check on YT. Many of those people will confirm the lack of customer support. AND, if you complain, they will quit doing business with you.