Kenneth Gilbert's 1983 traversal--(remastered and reissued, 2003)--is a very even-tempered reading of the great 24. Gilbert performs on quite an old small instrument: a Flemish double-manual harpsichord of 1671. This is not an huge-monster harpsichord, but rather more akin to the clavichord--that is, having fewer strings and therefore a smaller, thinner sound: lovely.
The recorded ambience is wonderful: this performance was miked properly.
As for Gilbert's realizations, he takes a very balanced, even-handed approach. His timing is steady; his dynamics, by no means excessive.
We highly esteem Gilbert's realization; indeed, rate it with Kirkpatrick's on clavichord and Gould's on piano. See too, Leonhardt, Watchorn, Richter, Nikolayeva.
By the way, while WTC Book 2 features some interesting and excellent preludes and fugues, they are more uniform than Book 1 which includes very exceptional and eccentric pieces--therefore potentially of more aesthetic value.