In reply to Suncream:
sorry this post is quite long and rambling but hopefully a good starting point until Theo's full review
The Dragonfly:
I have had a full set of dragonflies since they came out (first used them 1st july 2019). They are really nice, easy to handle and as previously mentioned the extender sling is a big bonus over the Z4s and Master cams. They are reassuring and have taken a grade off some routes as well as being super flexible. The poor flexibility of Master cams in the smaller sizes is why I would never ever consider them as micro cams.
I have a few reservations however having used the dragonflies that you probably won't find in existing reviews:
The trigger wires have a tendency to keep catching on the cam head and the cams often feel sticky (need to oil them again something I rarely had to do with my previous Totem basic - still the best micro cams I've used).
On one of the cams the little lug that attaches the trigger wire to the cam lobe fell off one of first times I went out rendering the cam completely useless. The retailer replaced and dealt with DMM. Apparently this known issue has been rectified and was only a problem on some of the first batches but it has always left me slightly uneasy that it could happen again and if I was mid route it could leave me in a sticky situation.
The sizing of the larger dragonflies sizes sit between the sizes of the existing Dragon cams (or the very similar and same colour Camalots, C4s and Friends). This is a big bonus for getting the correct size cam for the placement where it really matters as it does on smaller placements (not over camed but not loose either). However it is also a complete nightmare as the cams are the same colour where they overlap, this means when leading in a stressful situation and you reach for your purple cam for instance you now find that you now need to make to make sure you grab the correct purple cam when previously you would just grab the purple cam for that size placement. This issue has been completely overlooked in all reviews I've seen so far but have heard others complain of the same thing, and from several partners when borrowing them. It also means that mixing between different brands of micro cams could leave you with a bigger gap in your range than a overlap.
Leaving my reservations aside this is still an excellent choice and the larger number number of placement options a full set has opened up is incredible.
The Z4s:
Have played with these in a shop, they feel really well made and look really durable. As with all BD cams the trigger action is supper smooth. The stem going stiff when you pull back the trigger but goes floppy once placed is a really nice feature and should be really useful when sliding the cam inside a crack to the optimum placement or placing the cam at full reach. Another advantage I can see over the competition is the narrower head of the smallest cam (i haven't checked the others) is about 5mm smaller than the Dragonfly which will mean you will be able to get the Z4 into much smaller openings (or the trailing end of the cam when you insert it at an angle into even smaller openings easier that you wouldn't with a wider cam). You are also more likely to get a good placement where the placement is only parallel or good relative to the cam size for small width in a break or crack, this is important as with such small sizes a good placement is critical if you don't want the cam to blow.
The sizing issue I previously mentioned with the dragonflies is not an issue with the Z4s as the sizes match up with the existing C4/Friends/Dragons colours and sizes.
If you are into headpointing or aid climbing they also come in offset versions with split colour slings and cam heads to the corresponding cams which is a really neat design feature.
I'm considering buying a set of these and selling my dragonflies as I've been so impressed with them so far despite the drawback of not having a extender sling.
The Zero Friend
Again only played in the shop: These don't go as small as the Dragonflies but instead go slightly bigger like the old Alien cams did though for many the smallest dragonfly is only going to be of use on harder climbs and won't be missed. They have a beefier feel than the other cams and look like they are built to last however this means they feel slightly stiffer than the Dragonfly and Z4 but still supper flexible, certainly compared to the smaller Master cams. Again the sizes match up in the larger existing Friends/Dragons & C4s sizes so will avoid the issues of the dragonfly sizes. One reservation is how durable the shaped trigger wires will be after some use, when new they mean the wire is held clear of the head when you pull the trigger and would be better for sliding down inside a crack, however inevitably they are going to get pulled and miss shaped and i wonder how much this will affect the trigger action. I could see a set of Red to Blue or silver fitting in really well with mine or most peoples racks.
Totem Cams
Not a true micro cam but the smallest sizes (black/Blue&yellow 0.5-0.8) should be sufficient for many climbers not wanting the very tiniest cams. for their size they a probably my favourite cam, and well worth considering even if the price is slightly higher.
Post edited at 22:12