I got this lens as part of a kit containing the X-M1 and the two XC zoom lenses (all for just 530 €). I haven't yet upgraded the camera but will soon buy the X-T10 (for which I just acquired a second-hand 35mm f1.4). The long XC zoom lens is optically very good in my judgment, witness the zoo pictures by Marcelo Valente in this thread. Along the same lines I enclose pictures of a peregrine falcon (f10, 182mm, 1/420s, ISO 500) and a yawning lion in Copenhagen Zoo (f6.7, 230 mm, 1/170s, ISO 400). Zoom in and admire the majestic beauty of the falcon or check if His Majesty has a sore throat but remember the pictures have been heavily downsized. The OIS of the XC lens(es) also works well. X-M1 with XC lenses may be a modest combination but delivers excellent image quality.