It doesn't always travel well. I've had some bottles that were off. If you find it on the shelf, hold it up to the light and see if you can see large flakes floating around in it. If it does, pass. That's pretty much what I do with all imports. Whenever I see that, it's a tell that it's oxidized. They're in 750ml bottles. The Christmas version of it is good too.
If you ever get to Brussels, the Delirium Cafe usually has La Rulles Tripel on tap. They told me it was their second biggest seller after Delirium Tremens (I prefer the Nocturnum, myself).
It's not quite as aggressively hopped as Westmalle Tripel. It uses the Orval yeast (I was there when a brewer stopped by with what looked like a 5 gallon bucket of it), as do many breweries in the area. I have other notes on it at home, but it's a nice beer.
When Crispy Frey did his tripel experiment in Baltimore (I think), I remember liking the Orval yeast (WLP510) second best after the Westmalle yeast (WY3787). I remembered this when I was at the brewery; nice to see it confirmed in practice.