I prefer the stock app for looks and attaching media but the SMS delivery reports drive me crazy, it's such a stupid way to do it compared to the way most others do. For now I'll be using hangouts until they take it away next month.
I recently switched out textra to go back to the stock app. I didn't make it a day before I went back to textra. I couldn't get mms, wasn't getting all my text messages and I was getting empty text messages from unknown senders. Don't know whether the app was just having issues that day, but I wasn't going to keep waiting to see if it would start adding right. The stock app isn't bad when it works.