I was lucky enough to win this new Aspire tank in an online competition held by heavengifts.com. It was shipped on 27/5 via DHL, and I received it on 30/5. Heavengifts did ask if I would review this product. This review is my honest opinion, and has not been influenced by receiving the tank for free. I have used the original Aspire Nautilus Mini tank with BVC coils for a couple of years now, and I am a big fan. No other tank has stood the test of time like the Nautilus, and I still recommend them to new vapers, so I was excited to try the new Nautilus X. This thing looks every bit as good as my Goblin Mini on my MiniVolt! Awesome! The Nautilus X comes beautifully package in this curved plastic case. It comes with one 1.5 ohm U-Tech Coil installed, and one spare in the box. There is also a spare Pyrex tank. It did also have a little "Warning Card" advising me to allow the tank to stand for a while after filling to avoid burning the cotton, however there were no other "Usage Instructions" included. The Nautilus X is a great looking tank, with a nice small form factor that I find very appealing. I received the silver version, but it is also available in black and gold, plus a limited edition "rainbow version. It is 22mm in diameter, so we'll look great on most mods, and 45mm tall, including the 510 and drip tip. It holds 2ml of e-liquid and is consequently TPD compliant. There are also some optional accessories available, including a frosted tank section, and a larger Pyrex tank and chimney extension, that brings the Nautilus X up to 4ml capacity. The drip tip is Delrin, but fits around the chimney section on the top cap. This means that this tank is not compatible with standard 510 drip tips, and you are stuck with the one supplied. On the plus side, it is around the same outside diameter as a cigarette, which is an attractive feature for a new vaper. It has held true to it's original purpose as a true mouth-to-lung tank, with its air flow originating from the top of the tank. Adjustment is achieved by rotating the very top ring of the tank which is rather narrow, but not hard to do. When closed down, you can get a nice, tight, mouth-to-lung draw, when opened right up, you get a very restricted, direct-to-lung draw. This is something that could not be achieved on the Nautilus Mini, so the Nautilus X has more air than the old Mini. The top cap comes right off, which makes filling this tank a joy. An easy fill, even with the stubby tipped bottles. after filling I have not experienced any flooding or gurgling. The new U-Tech Coils are 1.5 ohm, and rated from 14 - 22 Watts. The coil head spans the complete depth of the tank, so there is no "chimney" section at all. The air path is a little different from any other coil heads I have seen. The air travels down from the inlet, through one coil, does a u-turn, then travels back up, through the second coil, to the drip tip. For this reason, the outlet from the coil is offset from the centre. This feature is also why this tank is advertised as a "leak proof" design. So far I have not had a single leak. I have been using the Nautilus X with 40PG/60VG e-liquid, and these coils have had no problems with wicking. This is due to the two, massive wick holes in the coil heads. I am definitely getting great flavour from this tank, every bit as good as the old Nautilus Mini with the BVC coils. Vapour production, in my opinion, is a little better. Overall, I have been really enjoying this tank, and would definitely recommend it to a new vaper, or someone looking for a good mouth-to-lung experience. I don't think I would go out and buy this tank, as I prefer my 22mm tanks to be rebuildable. However, if Aspire decide to release a "Mini" in 18mm diameter, more suitable for my CLK "eGo" style mods, I would definitely consider replacing my two originals. Pros: Looks great. Small form factor. 1.5 ohm coils make for great battery life. Pyrex tank. Easy top fill. Good flavour. Great vapour production. Cons: Only 2ml capacity. Non standard drip tip.