Not bad, but has drawbacks
Pros: I have taken this flight four times now - and it is normally on schedule, unless the weather is particularly bad. Boarding, take off and landing are exactly as scheduled, which is very good - definitely better than expected.
Cons: Planes are too warm - they keep the heat on the entire flight, and even the overhead A/C doesn't help much. Baggage - it is almost impossible, unless you book business or using a Russian issued credit card on the UTAIR site, to get bags included in your ticket. So you end up having to pay 25 to 30 USD for each bag, at the cashier - so it ends up being a hassle that isn't needed. And the counter personnel are usually not all that friendly... Very little other languages spoken other than Russian.