Alrighty ... here comes Diva's blunt-no holds bar-brutal-honesty.

Are they worth it? ... In all honesty? Not by a longshot. Wander down to any fabric store, grab 4.5m of cotton knit fabric, cut a third of it lengthwise so you've got a 4.5m strip approx 50cm wide and that's your hug-a-bub. Don't even need to sew the edges. Sure there's a cutie pocket on the front that let's you know where the middle is, but in all essence that's your hug-a-bub. Google mamatoto and there will be a heap of instructions including videos about how to tie it.

How comfortable are they? Heavenly. Supreme support, even the most nervous nellies will feel confident carrying their bub's in this. You can bend, crawl, pick things up, wander around and bub is staying put. Great for them sleeping too, tuck their little head in and it will even shield them from the sun/wind as well.

Ease of use? Middle of the range. It IS a little fiddly ... and if bub is having a tanty you'll have to put up with them screaming for a bit whilst you get yourself "strapped in". But the beauty of it is you can pull them in and out of it as many times as you like once you've strapped them in once.

Multisized? The 4.5m of fabric does me (size 18) and my hubby who's carrying more of a carton than a six pack :P . If you're worried about it not being enough, buy 5m and just chop off the rest.

Breastfeeding in a HAB? I personally haven't done it ...but once again google mamatoto and there's videos on how to do that too.

I don't mind the HAB ... but personally I find it too fiddly (I'm a wham, bam, thank you mam kinda gal ) I'm hoping the ergo is a little quicker to put on and off ... but if it doesn't offer the support of the HAB, I'll be back to it in a heartbeat.

Hope that helps.