I haven't used it either - well not estrogel but I do use testosterone gel.
I also think it depends on your lifestyle and perhaps the time of year and where on your body you apply it. If you have children or pets and are worried about transfer (eg if you live in a hot country or in the summer) you might want to apply it at night (depending on where you apply it) to avoid transfer as you should not have close persistent bodily contact for at least an hour. If you like to entwine with your partner in bed at night and eg apply to inner thighs, then the morning would be best. From reading on here some women split the dose.
I apply my T gel in the mornings - but then I wouldn't need to worry about that transferring to my husband - in fact he might even benefit from it
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Hurdity x