Cramer's Op.25 sonatas are valuable pedagogical pieces in the Classical style. They are designed to hone pianistic technique while offering engaging musical content.
Requires precision in executing rapid scales and broken chords.
3 Piano Sonatas (Op.25) is rated Henle level 5 of 9 — late intermediate repertoire, roughly ABRSM grades 6–7.
You should be comfortable at Henle level 5 — meaning you can already play level 4–5 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 Piano Sonatas (Op.25) lasts about 15 minutes.
3 Piano Sonatas (Op.25) is available as free public-domain sheet music on IMSLP — the score is linked directly from this page.