Open Sans is not a Helvetica replacement / poor man's Helvetica just because it is sans-serif. It belongs along side other beautiful sans faces like Avenir, Frutiger, Myriad, and others that have their own styles and worthiness in design.
Helvetica is indeed cool (the Neue family cooler, IMO) and has been since the 50s, and _Helvetica_ is also cool. Thinking of Helvetica as the only worthwhile sans-serif typeface is less cool :)
Helvetica is indeed cool (the Neue family cooler, IMO) and has been since the 50s, and _Helvetica_ is also cool. Thinking of Helvetica as the only worthwhile sans-serif typeface is less cool :)