Johann Baptist Cramer's Op. 2 sonatas are highly regarded pedagogical works known for their balanced musicality and clear technical challenges. They effectively bridge the Classical style with emerging Romantic sensibilities.
Requires fluent fingerwork, a sensitive touch for cantabile passages, and good dynamic control.
3 Sonatas (Op.2) 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 3 Sonatas (Op.2) lasts about 18 minutes.
3 Sonatas (Op.2) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.