I've only opened one so far, the red/purple, which I must say is just beautiful! The feel of it in the hand is great, the flavor is quite nice and on par with Suorin Air, which has been my main device. The pod snaps in and out beautifully but is held in place nicely. I love the foldable drip tip to keep it a bit more sanitary. I also like that the mouthpiece comes apart from the tank for cleaning. Battery life has been pretty amazing, and charging is relatively quick. And I have had no intermittent dry hits here an there which seems to be common in the Suorin. Each hit has been pleasant until the third tank. (See below)
But the downsides. As beautiful as the Compak A1 is, it shows every single fingerprint, smudge, spot, etc. in low light. I keep trying to wipe it down, but it just looks so dirty. It just seems to absorb the oils from your hand, and the smudges aren't really cleanable. I even tried rubbing alcohol when I cleaned the mouthpiece, but that actually made it more of a mess. Smudges aren't noticeable at all in bright light or outdoors.
Cleaning between the mouthpiece and tank is a snap, and I like that the condensation is here rather than leaking into the battery like the Suorin, which causes premature failure. But there's been quite a bit of juice in here. I'm a little surprised at how much I found the first time I cleaned it up.
I REALLY wish that the tanks were lighter on the side or had a clear window to monitor juice level. That's probably the biggest inconvenience. I'm constantly popping the tank in and out to check levels since I don't know how fast I'm using juice and I don't want to burn up the pod. It's easy enough to do, but a window would make this almost perfect.
Battery indicator - I've still not exactly figured this out. When I received it, I charged it up fully and then used it as normal. I never encountered a flashing light to let me know battery life was low. It just suddenly powered off, so I turned it back on, got one hit, and then it powered off again. Luckily I was home so I had a back up device, but this was unexpected. It would be great if the light changed from normal blue to another color when it reaches 30% or something, so you know to get to a charger. Just something noticeable so you're not left with a dead device. Oh, and the battery light is near impossible to see in bright light. I used it while driving on a sunny day yesterday and couldn't really tell if it lit up. It's rather faint. Works great at home in darker settings, though. There is NO stealth mode to turn light off, if that matters to you.
Lastly, the pod issues. The pod that was included looked a little rough, as did the new pack of pods I opened. I was initially weary that it may leak since it wasn't smooth and polished. It actually had some plastic build up around the bottom seam, which I suspect was just a rush job through the factory. It hasn't leaked, just looks really cheap and potentially faulty. But additionally with the pod...I initially filled it, vaped it down to about 25%, refilled and cleaned it, and repeated. Second tank was fine. Repeated. But when I tried to vape the third tank after charging, it tastes burnt. Every time I've tried to hit it, a light burnt taste which is not enjoyable or really vapeable. I really thought a tank would last more than 2 fills, so this could make this device quite expensive in the long run. 2ml of premium juice wasted.
I'm on my second fill of the second pod. I do like this device and recommend it so far pending further use. With a few little changes, this could be my go to pod device.