One of the best plots I found in a videogame, at no point did I feel like things were getting boring. Still, that doesn't mean I don't wish there was a more effective way to skip cutscenes on the PSX version. As for the gameplay, it's pretty interesting as well, not too fan of the infiltration type of stuff but thankfully there isn't an excessive amount of it. It also offers a decent challenge in many instances which is good since it would have been a shame for it to be too easy and turn into a glorified visual novel.
All and all, a satisfying experience !!!