Plants arrived in good condition, ready for the pond and clearly labelled as regards planting depth. Delivery was very prompt - much better in this regard than another supplier I have used.
Plants supplied were mature plants of a good size - not young plants to be grown on.
Only disappointment - nothing to do with the seller - is that one plant has already slid from the margins into the depths of the pond and can't be found! What's the solution? Would shingle added to sloping shelves stay put and level off the shelves? Maybe tether the plant pots with strong fishing line to pegs beside the pond (taking care to avoid creating a tripping hazard) or attach something which floats, as a marker buoy, to recover submerged plants?! Floating planters are OK but it may be hard to arrange for the plants to be submerged to the right depth. Obviously, the Draconian solution would be to remake my liner-based pond and construct it better, with different depth marginal shelves which start out flat (or sloping slightly towards the pond edge) and don't crumble or collapse during construction!