Manhunt was one of the first, if not the first, gay hook-up websites. In fact, I joined nearly 20 years ago. Way back then, there was a pretty good assortment of men, and the user interface wasn't any worse than any other website. The website was redesigned at least 10 years ago; it changed almost nothing, and I always thought the web designer was overpaid for that effort. The iOS app I always found to be close to useless.
When I was playing in the Philadelphia area 10-15 years ago, there were plenty of hot guys on the site (and I played with a fair number of them). Nowadays, at least in my neck of the woods, there seems to be an underrepresentation of guys under 40; in Ft. Lauderdale, in contrast, the age range is much more balanced. A lot of profiles aren't much more than shell profiles, ie, a profile that contains no information. The mail program is ok, and searching for a member isn't too complicated. Trying to do an area search (eg, men between 25-45, slim build, availability "ask me") will cause one to throw the Bluetooth mouse across the room. Free accounts get 25 mail conversations a day and can only usefully see the main profile picture. Paid accounts aren't outrageously expensive; I choose a 90 day non-recurring plan, and it's the grand sum of $35. My current plan expires in 7 days, and I'm not renewing since the return on investment, so to speak, has been pretty minimal.
Needless to say, all of this is just my opinion, and someone in a different part of the country may well have a different customer experience. In any event, I hope this is of some help.