I have a sputnik and its been a good bike so far; had it 4 months or so. Im 6'1" and about 190-200lbs.

The components seem fine. Im not so anxious for more expensive parts to get rid of working components. Ill replace them as they get worn out. Except for mybe the handle bars, ive been thinking something a little fatter with no grooves would be the way to go, just havent stumbled upon the right replacement. And I swapped the seat out for another one I had during the rainy season.