Harveston is probably the best location for being “close to everything” in Temecula. But, notice I said “in Temecula”. Temecula itself is a pretty small exurb of San Diego and you’ll face long drives in traffic if you want to get to things like beaches, museums, airports, or big-city type cultural attractions.
Even Harveston isn’t really very walkable – only within the subdivision. If you want to walk to the nearby Starbucks, there’s no direct way to walk there – you have to walk all the way out to a main street and then cut through the parking lots dodging cars. It’s like the people that planned out this area owned a lot of stock in Goodyear, GM, and Exxon. No neighborhood in Temecula is truly “close to everything” although some would have buyers believe they are.