I have the book, Conversational Latin. I think it's well written and well structured. Its subtitle is "Phrase Book and Dictionary". I find it very useful for conversational Latin. I'm glad I bought it. Not everyone wants to learn conversational latin and I don't teach Latin but imagine it as a very useful classroom resource, as Lingua Latina is a useful resource. It (Conversational Latin) belongs to a core set of books that I often refer to. I also have Piper Salve: Cursus Vivae Latinitatis (1992-98) and refer to that book less often, partly because vowel lengths and stress aren't marked in Piper Salve but they are in Conversational Latin and I think that of vital importance.
Hunc librum, scilicet Conversational Latin, habeo et eum bene scriptum bene compositum esse considero. "Phrase Book and Dictionary" subtitulum est. Perutilis mihi est et emptio laeta. Sunt ei quibus non curae est viva latinitas, porrò eandem non doceo (nec capax ego). Credo autem et utilis ut instrumentum pergulae est liber unâ cum aliis ut illo de Orberg. Alius liber ei similis est Piper Salve: Cursus Vivae Latinitatis (1992-98) quem et teneo, at minùs utilis ille quod carent notae vis vocalumque longarum quae magni momenti his rebus sunt, ut opinor.
I'm writing in Latin hoping for correction, and not because I'm confident in how I express myself. Latinè scribo ut ab omnibus corrigar, non quod confidenter me exprimam.