Johann Baptist Cramer's sonatas are significant contributions to the Classical piano repertoire, known for their technical demands and musical clarity. They serve as excellent studies in passagework and clear phrasing.
Focus on precise execution of rapid arpeggios and maintaining rhythmic drive throughout the movements.
2 Piano Sonatas (Op.8) is rated Henle level 4 of 9 — intermediate repertoire, roughly ABRSM grades 5–6. In the RCM system it corresponds to about level 6.
You should be comfortable at Henle level 4 — meaning you can already play level 3–4 pieces cleanly. Learning it one level early is possible as a stretch piece, but more than that usually leads to months of frustration.
A typical performance of 2 Piano Sonatas (Op.8) lasts about 18 minutes.
2 Piano Sonatas (Op.8) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.