DaS3 was fun, and I'd say it's worth ~$30 even if you drop it after finishing NG. It's got some issues that mostly affect PvP balance that are slowly being resolved, though. At launch, as far as people have been able to determine, poise was entirely disabled (though there are hyperarmor frames on some heavy weapons), so PvP was almost exclusively a mix of R1 spam (fuckin' Estoc and Dark Sword) and Hornet Ring parry-baiting, gimmick builds aside. There are only maybe three or four spots in the game to find reliable PvP and the wolfbro covenant area isn't one of them.
Speed-wise it's slower paced combat than Bloodborne but definitely the fastest Souls game. They leaned heavily on the nostalgia factor and a certain amount of the enjoyment of the game comes from those moments of surprised recognition. There was a fairly high number of good or great boss fights, but also a couple really lame gimmick ones (and also a non-boss encounter which was legitimately more difficult than a lot of the bosses if you didn't know exactly how to cheese it).
Summoning and invading is a mixed bag. On the one hand it's a total chugfest unless everyone is honorable, but on the other that allows fight clubs to run much more reliably. A lot of it is overrun with shitty gank squads and a lot of hosts are little bitches who continually run away to resummon because anything less than three friendly summons against an invader is too hard for them, but in the most active PvP area that just means that they're going to get swarmed by Watchdogs in addition to red and purple invaders. If you're going to invade you need to be lucky, good, or running a gankspanking build.
Oh, and they fucked up estus. The chug is so fast and movement during it slowed so little that someone can backroll twice, chug, and be ready to parry by the time you've closed the gap, so a big chunk of PvP against shitters is learning to roll-chase really well (or oneshotting with Hornet Ring parries).
Basically it's fun the first time through, depends on personal preference for NG+ onward, and PvP is kinda fucky. But yeah, definitely worth it, there are some really fun boss fights.