I have the new edition of the Old Rite prayerbook. I have a particular interest in the pre-Nikonian usage. If you are a fan of such works as Paul Meyendorff's "Russia, Ritual & Reform" you will be happy to acquire the Old Rite prayerbook. As you say you can read Church Slavonic you will not be able to notice many of the revisions. Much of the English seems very familiar. Of course there is plenty of information about prostrations and how to make the sign of the cross, etc. All of that is very interesting and helpful to someone interested in the Old Rite.
It has the usual pre-communion prayers etc. I do not know about using it in my private prayer though, that I would put before my spritual father for his opinion. Pre-Nikonian usage is certainly the patrimony of the entire Orthodox Church and deserves attention.