I started out by hand stitching the batting strips together. Then I tried the batting tape but it seemed like a lot of trouble to line the batting up on a flat surface where I could iron on the tape, and I didn't always have the tape available. Now I just zigzag the two pieces together. It's quick and easy, doesn't show when the quilt is finished, doesn't add any bulk, and the only expense is the thread.

I use it but I do press it on and then do a serpentine down the length of the tape to hold it together.
I found I was stretching the batting when trying to just sew large pieces together, fought this but couldn't seem to change the habit. I was able to overcome that by taping first.

Jan in VA

I use it and love it!

I use it without any problem. I iron it on in strips about 24" long so that I can keep it straight while I put it on. Just remember that poly batting is a no-no with the iron. I've used it without problems on Hobb 80/20, Pellon Legacy and Hobbs Washable wool bat . also, you can cut "French Fusible" (the stuff that looks like a lightweight Knit with fusible on it ) into strips to use--but the tape is about the same price and less hassle.

When I sometime sew bat pieces together it seems like I end up with them being "bunchy".

I use all the time. First I butt 2 battings together, press on the tape, then sew a wide stretch zig zag to reinforce it. Then I found it a tad pricey, so i switched to fusible tricot and could control the width better. Never had any problems with it.

it works fine, but i find it an extra expense, so I don't bother.

I've not used it because machine sewing pieces together works fine for me. I use the zig zag stitch that takes stitches as it zigs and zags, so I don't get any bunching along the two edges. It stays perfectly flat as I join the edges, and you can't tell at all that the batting is pieced, even by running your hand over it.

I make my own iron on 'tape' to join pieces of batting with strips of fusible knit interfacing that I bought from Nancy's Notions. I cut mine on the bias and made it two inches wide. I over lap the batting pieces a little bit and cut through both sides.
Doing that makes the edges fit exactly with no bulging or blank areas. Then tape it and press. It is very inexpensive to do it this way.

for me, i didn't like the tape. i use my joiner foot and zig zag them together. to keep them fed evenly, i will pin them together in a few places with a little overlap. as i get to the pin, jut pull the pin out

I HAD to use it on battingthat I didn't make long enough...it was already partially quilted. Yep, a 'duh' moment. The iron on tape worked fine. Just have to be aware of content of your batting.