None of the methods mentioned are dummy-proof (I say this as a first rate crafts dummy, myself). In other words, the results are as likely to be disappointing as not. Unsurprisingly, for a number of reasons this is true of transfer paper, as well.

First, the image you see on your computer monitor is very likely not the image you’ll be able to replicate exactly on fabric. There are several reasons for this. First, you might already notice that the colors in your photos don’t print exactly as they appear on the monitor. If this is true, the calibration is off. Ways of addressing this differ, but put “color calibration” into a search engine.

Second, I get better results by making the image darker than for printing on photo or ordinary paper. I think this might be in part because…

Third, it has begun to seem doubtful that an ordinary iron can maintain temperatures hot enough to transfer the image fully, especially if the colors are supposed to be dark, deeply saturated, or bright. Although our iron can be set to very hot temperatures (ouch! ouch!), the iron is not in continuous contact with all of the image at once. Consequently, sometimes there is a little trouble with the image rippling and thus shifting a little. In the repeated passes that must be made with the iron, I suspect that the iron does not remain hot enough. Related to this, I think, is that the times proposed by the manufacturer for heating the transfer have not been long enough, sometimes by a factor of two or three.

So these are all reasons that one could say the product doesn’t work well. Still, for me it represents an interesting way of printing my own design on fabric. Mostly, I haven’t the patience or skills for other ways and for reliable results, I believe the better choice would be use the services of someone who has professional equipment and skill. But I really do enjoy experimenting, myself, to see what can be made.

For what the product is trying to do, it seems relatively inexpensive (though not cheap, by any means) to me. But the operative word really is “experimenting”, because the results are by no means certain. I’ve knocked off a star because IMHO the manufacturer’s blurb leads people to expect more than the product is at this point capable of delivering. It really is an experiment and I can’t help feeling that folks would be less disgruntled if Avery were to dial back their description to one that is perhaps more realistic.
Rating: 4 / 5

Advice: print on the white ridged side. NOT the smooth blue side! (I am no transfer pro so it was not clear to me. It really wasn’t.) So unless you’re a pro and have been doing transfers for a while, this might not be the best company to use.
Rating: 1 / 5