Never had an 1120, only it's bigger brother the 2500D (both based on an ETA-2892; the latter having Co-Axial escapement).
Looking forward to having soon a Seamaster 120m (massively underappreciated IMO), or a 90's/2000's SMP; both which have the 1120.
Love that it's a proven workhorse, and an independent watchmaker can service it easier than modern Omega movements (unless they are Omega certified with access to parts).