The biggest disadvantage is you have to be added to chats via your Apple ID instead of your phone number unless you jump through some hoops to get your primary phone number registered with iMessage. I've been using this in some way shape or form for the last several years from Airmessage to Bluebubbles to Beeper with just my Apple ID. I used one of the tricks to register my primary "Android" phone number with iMessage earlier this summer and it's been working great since. Just cost me a few bucks for an old iPhone 8 with a cracked screen and an old SIM. It just sits at my house and thinks it still has my primary number in it.