still in this size a waterproofing would be possible, but not as easy to manufacture
Got mine for Illumn yesterday, it was exactly as I expected (but was hoping to be surprised).
It’s a carry nightmare unless you lock it out, and if its just in your pocket it is a big lump that sticks out.
Buttons are hyper-sensitive, they are so ready to click, it’s kinda funny. No way it’s NOT coming on in your pocket.
Power button is almost as far away from your thumb as possible when holding it.
There’s just no carrying this in the real world without locking it out.
The weight of it makes me wonder if it’s empty. It works, so I guess not.
Clip is great, but everything is so cramped on this light you’ll probably turn it on trying to use the clip.
In spite of all of that, it’s a cool little light! Got a great GB price on Illumn, I’ve know people to spend 2x that and only have a hangover to show for it.
I’ve bought all of the tubular lights one could ever want so I’m usually all-in when a new light that is any other shape is released.
I’ve been struggling to find a use for the “coulda been great” Lumintop Geek, finally found something: clip to belt and it makes a fantastic belt light that has no competition!
The Tup will remain on my desk until I find it’s true calling. Despite all the negatives, there’s a lot to like.
UI is decent.
Button functions are logical and easy to remember, despite too sensitive.
Stock tint is usable.
Has a strong, fixed clip.
USB port has a boss dust cover.
The screen, the glorious screen!!! Pretty cool having a readout to give you some useful information. We should tell the vape makers there’s money in flashlights and watch what happens.
Will update when I find the perfect use for the TUP.
Oh yeah, I was able to file down the metal tops of the switches on the TIP and make it more pocket-friendly, don’t think I’ll be able to do that with the TUP because it doesn’t have rubber buttons.
+1 @bansuri’s observations for me as well.
I like the TUP UI (similar to the TIP UI, one of my favorite), nice display, nice clip, nice mode spacing, nice battery capacity and light weight.
I can live with the size which is bulkier than typical keychain lights but comparable to a small cr123a pocket light. But those buttons are simply way too prone to accidental activation. One would have thought Nitecore applied the lessons learned about accidental Button Press from the TIP 
The Lock-1 feature is relatively easy to activate/deactivate but it would be nice not to have to do so. I actually don’t have a problem with the TIP’s buttons, but for those who do/did, stay clear.
My first tweak will be to do something about those buttons. Either raising the area surrounding the buttons or lowering the button height, to reduce accidental button presses taking the light in/out of pocket or clipping/unclipping.
FWIW, here are some photos for size and tint comparison against the TIP CRI. The slight green tint is not nearly as pronouced as appears on screen, but the beamshot image (1-ft distance) is fairly accurate otherwise. Larger cool white TIR-type hotspot with less spill than the TIP.
TUP (on left), TIP CRI (on right)
edit:
TUP after a little Magenta Correction of the TIR for Green 
bansuri and pc_light are spot-on in detailing the problem areas for the light. It’s a fun light, I don’t regret buying it but no way is it getting carried in a pants pocket.
For now it’ll be close to hand on my desk to grab when I need a quick blast of light (until something else catches my fancy).
Anyone replace the LED on the TUP?
Love the little light and great battery, as usual i cant stand the XP-L HD 1A blue/green mess.
Is it a removable MCPCB for an easy reflow? Or is it glued onto that heatsink/metal band?
Im thinking a high CRI LH351D at say 4000k, maybe 5000K to keep a similar output.
I did exactly that mod. The PCB is easily removable, and it’s a pretty straight forward swap. No glue, but that yellow sheet needs to be progress off.
Well said fran82 they have always been expensive flashlights to buy.
for your information, my nitecore Tup battery is dead after 13 months the battery go down in 5 days even with no use and i get 35 minutes at 200 lumens instead of 2 hours and more
no answer from my reseller
That sucks. If you can find a replacement cell it wouldn’t be too hard to solder in.