Here is my input for whats its worth.
The SS coils (esp) the .25 is absolutely the best coil I have vaped including Kantal, Ni200 or Ti. The flavor from these is unmatched and if anyone were to vape on it they would be hard pressed to disagree even slightly. If you like a cooler vape, then the .5 is your coil.
I am a TC junkie and had to try the Ni200 coils in the Crown. I have one in mine now and it has seen almost 200 ml of high custard juice. Looking down the center of the dual coil hole, this this is junked up as hell BUT the flavor or vapor has not diminished even slightly. I am on a mission to see how long I can vape this at 50 watts, 520 degrees before it starts to loose flavor. I do like the Ni200 coils but the SS is still better for flavor and clouds. Now since I am a TC guy I was sure I needed TC to make me happy.... Not the case with this tank. I am very happy using this in power mode with the SS coils. That might be because of the dual coils, these need some power to get them going and I doubt I would hit the TC limit on these unless it was set down in the low 400F range. I like my vapes around 500 so for me there is not much difference at all. Once SS TC comes out and is proven, I will certainly try it but I am in no hurry. Also with the ever growing popularity of the Crown, I am sure its only a matter of time before Uwell comes out with some Ti coils. I have tried Ti in the RBA and it is very flavorful but again, my impression is the SS is better. Also, I find with my RBA's (Crown, VCT, Billows) I do have to rewick and burn off the junk about every day - day 1/2 so thats a real PITA for me. I love the stock coils for the ease of keeping on the go. Also with the long life of these, you dont have to worry about carrying around extra coils in case the one you have just quits like most other coils do. I have had mine for a few weeks and have yet to have a coil foul, burn out or just be spent. I have tried them all (.5, .25 Ni200) they have all seen some serious ml of juice and they all still work great. I did have 2 bum Ni200 coils to start with but that has seemed to correct itself on my third. Other than those two bum coils I have not had a single problem with it. The RBA can be a bit finicky with filling but again, I like the stock coils for their flavor and long life anyway. The only reason I can see using the RBA section would be if I ever did run out of coils or wanted to try several different juices and didnt want to put all the variations through my coil. Speaking of that, I did have my Ni200 coil in it and due to some of my own stupidity I ran out of VG. While waiting for more to arrive, I resorted to using all the juices I had in cabinets. Within one week, that one coil saw my normal junky custard juice, a heavy strawberry cream, a very peanuty PB vape, some Dr Pepper juice, Yeti Nuclear Nut Butter, a fruit loops cereal vape and now I have my heavy Cantaloupe Game over custard in the same coil. Through all those flavors, each one was very apparent, never muted, and now my ADV vape tastes like it does in a new coil. So thats my thoughts, all I have to do now is wait on the additional Crowns I have ordered so I can keep several in rotation at all times.
If you are a crown owner, then I am sure you are a crown lover, if not then your are missing the boat on a great vaping experience all around
Peace out brothers and sisters...