I used Trophy's for an install I did for a neighbor near our cabin. This is at a little under 9,000 ft elevation in the Colorado mountains, so it get's cold there in the winter.
I went with Trophy in part because of the built in heating, but also because of the reputation of the guy who runs the company. He lived up to - and exceeded - my expectations. We got stuck on getting the batteries to correctly report SoC to the Victron Cerbo GX, and he spent a total over probably close to an hour in three phone calls to help us get it working. Awesome guy.
One thing I didn't really like is the way the Trophy's manage the heating, which unfortunately seems to be the way all the batteries that do have heaters manage their heaters. The heat doesn't turn on until the temperature falls to the point where the BMS cuts off charging. You asked if there was an interruption to charging while the batteries heated up, and this design almost guarantees that there would be an interruption. I think the logical way it should work is that the heaters should be turned on TO PREVENT the BMS having to cut of charging. To correct for this I augmented the battery box with the same thermostat-controlled heating pads that I used previously. Two pads on the sides of each Trophy battery case, set to turn on whenever the temperature of the case got to something like 38°F (I can't remember now exactly where I set it). When I talked to the neighbor in late January he said that whenever he went into the cabin the batteries were generally around 40°F, even though the outside temp was closer to 10°F.
