Not so great..
Ok so this app works but there are tons of flaws in it. Apparently it wont work with tmobile users, they will get your text but you will not get their replies, even the dev tried it with his buddy and said it took 2 days for him to get the reply. Another thing is that you type the first message in the app and when you hit send it will just open up the email then you got to send it again through the email, minus well just save your dollar and use your email for SMS then right? Another flaw is when you get a reply from you buddies, and you reply to that via email, they see the previous reply also so if you typed a long text your buddy is going to get that text AGAIN + the new text your typing, so one text can be very long and confusing to your friend and it can be annoying. I went on the hfi website for help and matt was helping me for awhile but its been a week now and no replies from him...I dont recommend this app, just launch your email and use that instead of this app..
Simply T about
Free SMS