I had an Ariston by Splendide
combo (vented) in my 2005 and had no trouble with the unit with 3 years of use. The factory did connect the lines backwards. Turns out, at least for this model, the water lines are polarized. As in, it matters which end connects to the unit and which end connects to the faucet. During the PDI, we found water leaking into the
Drain-A-Way pan under the unit. Was a bear to get the unit out but we got it done right there in the lot and not a lick of trouble thereafter.
On my current coach, a 2009, we have the Ariston by Splendide
separates. Here again, no trouble with the units and used them quite a bit in its first season. Already done a number of loads this second season.
You will want that pan under the washer. One thing to check for is the discharge port on one corner. I've noticed on mine that a vinyl hose is connected to it and it looks kinked due to a sharp angle in routing. I never think of fixing it or adding it to my list whenever I have the unit service.
Others on this forum and with other RV brands use another brand of washer and dryer. Some Maytag and some Kenmore (probably the same thing). Unsure of models. Check with kakampers on this forum as I think Kathy has another brand.
I have heard some negatives on the Majestic brand in past years. I don't think we offer that brand and they may be better now than some reviews I read years back.
Best of luck to you.
Jim