The smell is most noticeable in the McCarthy Ranch/Milpitas Square complexes during the warm months. It smells of raw sewage and grease especially on the 99 Ranch side because of the poor sanitation (rotting garbage, raw meat juice, spilled used cooking oil, etc.) behind the restaurants. There's a parking lot on the left side of the strip mall behind Won Kee -- you'll see and smell what I mean if you ever park there.
What's worse is at sunset when it's warm out, swarms of phorrid flies are everywhere and you have to run and get out of/into your car as quick as possible. You'll have a few stuck on you and in you car (crawling on the inside of your windshield) for sure.
Why anyone wants to move out to Milpitas/North San Jose/Rivermark now is silly -- but that's just my opinion.
The traffic along 237 is TERRIBLE heading East and West during rush hour. Traffic starts to back up from the North 1st Street exit to the 880N on ramp at 2.15 PM. When there are events going on at Levi's Stadium on weekdays, commuters on 101 and 237 are screwed.
I'm a stay-at-home dad (not by choice) so luckily, I don't always have to brave the traffic. The phorrid fly phenomenon started less than ten years ago and we hardly eat dinner at the McCarthy complexes anymore but if we do, we go while the sun is still out.
The SJC air traffic noise is annoying too. Takeoff begins at 6.00 AM and the rumbling from the planes is continuous until the early flights have departed.
We've been living in the North Park and Crescent Village communities since 2003 and we're getting outta here ASAP (primarily for kids). It's just getting way too congested here and it's only going to get worse with the tens of new office buildings and hotels that are being built or just completed along 237 and in North San Jose.
Sorry if I rambled too much.