The advantage of any of these 1.5V, and I've settled on the blue 3500 Hixon ones, is the voltage. The best use I have found are my unregulated 2-cell LED candles. Granted, that is $8-10 of batteries in $5 candles, but it's a hobby. The AAA are handy in a LCD remote thermometer where the contrast is not good at 1.2V (1.3 is iffy). I've also read about people enjoying them in incandescent mini mag flashlights, and apparently the bulb doesn't burn out unreasonably fast.
They can also be handy in motorized things, though, of course, you have to wonder if it will shorten motor life. Not in a door lock, probably, but possibly in a massager or cheapie RC toy.
I've had too many failures with EBL to recommend them, though I am enjoying the aesthetically nifty end-charge ST7 and ST5 cells that have a sloping voltage (1.3V-ish much of the time).
XTAR I find to be too expensive and/or limited availability of the product I want. The BC chargers are much better, as they'll do NiMH as well, but on Amazon, their reasonably priced sets all push the LC series that only does LiIon 1.5V. They need to get their full line, in useful combo packs, up on amazon.