I flew UL from KUL to CMB and back in economy as an RJ Emerald. No lounge invitations or fast track vouchers given at KUL (of course I accessed MH F lounge by virtue of the BP anyways). No seat block, no priority boarding at either KUL or CMB and no onboard recognition like you would find on CX. Seat choice is available to everyone regardless of status in MMB.

In CMB,OWS/OWEs are sent to a much more inferior lounge than J pax . It's small,lacks toilets but has the same food spread as the proper J lounge (both have very good catering) and stayed empty for the most part (I assume UL does not have to many elites flying them).

Other than that UL is a very decent airline ,with very generous legroom in Y and good catering and friendly and efficient crew.