Honest 3.5 stars (decent if not fantastic).
On the positive side: very responsive, persistent and interested even in a small job (which mine ended up being - laying one layer of hardwood floor on top of existing subfloor in a room of about 144 sqf). Helped to source the flooring during the lockdown, when it was next to impossible to find a supplier. Reliable, turned up on time, did a clean job and cleaned up afterwards. The whole job only took a few hours.
On the not so positive side: The end result.
The floor was laid starting from the sides of the room, towards the middle, which resulted in a gap in the most visible spot right in front (which has been filled with wood filler when we pointed it out). When they arrived, the crew asked where the cabinets would go (the room was a kitchen), as we assumed, for some purpose (such as, to put the more knotty boards where they would not be visible). As it turned out, we have wonderfully smooth and near to perfect flooring under the cabinets, and all the really dark knots (some of which do look like splashes of ink) bang in the middle, on display. The worst of these (one floorboard) has been replaced upon our request before the crew left (there was still one whole pack of flooring left, so it was not for lack of material).
Overall opinion: would employ them again, just bear in mind you have to stand over them and oversee the work in minor detail (which we failed to do).