It goes for $3.79 by itself in my area or for $5 as part of a Big Box meal, which also includes a crunchy taco, a Doritos Locos Taco, and a medium drink. I spent the extra $1.21 (which is a little less than how much a crunchy taco costs) for the box combo.
While the Triple Double Crunchwrap does indeed come with more filling than a regular Crunchwrap Supreme, despite the name, it doesn't appear to come with double the beef (the new Crunchwrap is good for 23 grams of protein versus 17 grams for the Crunchwrap Supreme).
My answer is: Not really. While the Triple Double does indeed look and feel more substantial than the Crunchwrap Supreme, it didn't taste notably beefier, cheesier, nor crunchier, although it was more filling. For the most part, it just felt like a larger Crunchwrap with the same enjoyable flavor profile courtesy of a classic combination of Taco Bell components.
Overall, Taco Bell's Triple Double Crunchwrap was very much as tasty as a Crunchwrap Supreme but didn't bring much more to the table other than more food to fill my stomach. It's a really nice value if you're a Crunchwrap Supreme fan (which I am) and grab the $5 combo.
Nutritional Info - Taco Bell Triple Double Crunchwrap
Calories - 700 (from Fat - 270)
Fat - 30g (Saturated Fat - 9g)
Sodium - 1550mg
Carbs - 85g (Sugar - 7g)
Protein - 23g