Finally got to play this classic, and considering its status among the fans, gotta admit I was a little bit disappointed.
I was expecting something to the tune of Sound of a Burrick in a Room - grand, open city with abundant gameplay choices and increased emphasis on the vertical, but instead it plays closer to Rose Garden - being caught in a loop of individual challenges to progress via predetermined checkpoints, somewhat more similar to the Thi4f mechanics rather than classic Thief gameplay. The illusion of freedom manifested with multitude of perfectly logical entryways blocked off just for the sake of forcing a player to walk the pre-established route, preferably also having to quick-load dozens of times (though admittedly, the number of near-impossible leaps in Endless Rain came nowhere close to that of Rose Garden).
Gotta admit I'm having hard time understanding why such type of gameplay has found such enormous popularity recently, both among the FM-players and creators, while you could as well have a rooftop/vertical mission much more open to player choices.
While recognizing the amazing craftsmanship as well as amount of work required to create such astounding spaces in a vintage game, I can't honestly say I enjoyed the gameplay apsect here.