If you're looking for something in a similar devotional format, go for Spurgeon's Morning and Evening instead. Or just pick up a Puritan paperback. I don't know if there is any major heresy advocated in Chambers' stuff, but there's much better out there.

__________________
Bryan Peters
Providence Reformed Church (URCNA)
Des Moines, Iowa

Doctrinal truth should be preached always, openly, without compromise, and never dissembled or concealed. There is no offence in it; it is the staff of uprightness.
~Martin Luther~