If you're looking for great capacity and a nice LR hit on your Riva they're a good choice. I even cleaned one which surprised me because I'm incredibly lazy and usually just toss cartos but I'd refilled one with a different flavor (NOT a good mix) and had nothing to lose. It was as easy as running hot tap water through it and blowing it out until the fill was white again - didn't even take that long.
One thing - watching your
juice level can be either wonderful or yucky, depending on the
juice. The 'bakery' flavors and my menthol don't really oxidize and turn unappetizing hues but if you vape something that does it might be off-putting.
And, you may find yourself swapping batteries more frequently because dual
coils just naturally drain power a bit faster.
Happy

!