Orthodontic TADs and forcus (bite jumpers)?

I recently went to my orthodontist to discuss the second phase of my treatment, which is braces. I was told that, as part of the treatment, i would need to get two special appliances put in. One is a TAD, or temporary anchorage device. The other is forcus (pronounced forces), also known as bite jumpers. I was wondering if anyone out there has had them in the past and could tell me if either of them are painful or affect your speech in any way? Are they visible when you're talking or when you open your mouth? Also do they affect what and how you eat? And how long generally did they take to work before they came off (i know everyone is different, im just curious)? I'm going on freshman year at a new school, i made cheer team but id rather not be known as the girl with the lisp because of her clunky braces. I appreciate any help possible. Thanks! :D