I've had a Google number for a couple years now, and I love it. It's also easy to remember (area code - 3 digits - my name). I got a DC area code not because of DC, but because it was one of the few I could get with my name.
This isn't necessarily "number" advice, but definitely Google Voice advice: Be aware of people's numbers through voice and through your regular number.
What does that mean? Well. The way voice works with your phone, is that if your boss texts you, and their number is 123-456-7890, that's not the number you'll get. You'll get a random number with no current owner. Let's say 333-333-3333. Nope, they won't even share the area code. That's google's way of letting you call that number back from your phone and it showing up as from your google number. This random number is different for everyone, but only works from your phone. So if I, with a different google number, call that 333-333-3333, it will call a different one of my contacts.
Why this is good: You can call anyone back when you're out of a WiFi zone without eating into your data plan.
Why this is bad: You'll get calls from numbers you don't recognize, and if you forget to call their random number, they won't recognize your number either.
So I have at least two numbers for every professional contact on my phone - 1) their regular number, which I can call through the app, and I have labeled "mobile." 2) their "random" number, which I can call from my phone, which I have labeled "work fax."
It took me a couple of months to really get a grasp of it and not confuse the numbers - and I still have to tell people to text my "regular" number sometimes because I can't send or receive images or other media files through Google. But when you get used to it, I definitely think a Google number is an advantage - you can get calls and texts on your computer and across devices, so you can stay on top of actor ETAs and designer concerns in rehearsal without being on your phone. If your phone dies or is stolen (I actually got mugged halfway through a run once, and this was a godsend), you can still get a hold of your people from any computer. And if you ever want to stop someone from contacting you, you can just tell Google to block that number. I feel a lot more comfortable plastering my Google number all over emails and resumes and documents now, knowing that I don't have to worry about who has access to those documents.