Conservative Judaism's quest to balance tradition with modernity finds compelling expression in the 1985 *Siddur Sim Shalom*, edited by Rabbi Jules Harlow for The Rabbinical Assembly. Through devotional experience and scholarly analysis, this evaluation reveals how the prayerbook successfully navigates between ancient Jewish worship patterns and contemporary sensibilities. Its key strengths emerge through enlightened selection of prayers, dignified yet accessible English translations, thoughtfully constructed responsive readings, and feminist-conscious language that preserves traditional divine appellations. The siddur's liberal modernist theology employs careful paraphrasing to accommodate diverse beliefs while demonstrating sophisticated understanding of liturgical development. Multiple service variations maintain authentic connections to historic Jewish worship patterns. However, several limitations warrant attention: the 880-page length extends services considerably, problematic elements like the Musaph service and ambiguous Temple restoration references remain, certain Hebrew poems suffer from inadequate translation, and extensive English transliterations point to limited Hebrew literacy among Conservative Jews. Despite these shortcomings, *Siddur Sim Shalom* stands as the most effective prayerbook for American Conservative Judaism, serving its pluralistic community while preserving liturgical authenticity. The work exemplifies Conservative Judaism's continuation of German Liberal Judaism's approach: educated adaptation rather than radical reform.