TM hands down, full temp range, you can use it with a plain glass stem and other glass piece, I milk the lowest possible temp settings stepping up tiny bit by tiny bit for each hit, because I love those low temp effects and flavors! What I reach for to get the ideal taste (Firefly2+ has some great flavor with whole nugs or chunky grind on the low end, but that is all it's good for, pretty frustrating to use otherwise) much better than GH flavor and many other benefits over it... Milaana is also pretty top tier for flavor, something special, but the TM is a good compromise because you get so many other benefits with the regulation and secure stem connection, overall better than a Splinter or iHeat in my experience too... And by the way the TM is not technically really a pre-order, just goes in and out of stock sometimes, but it is a quick turnaround, in the past when it was a pre-order, the unit still shipped within a week or two... It's not like a traditional pre-order I assure you, you can email to ask when the next stock is coming in, I think someone already did that and it was said early June, like this week?? Look in the thread and or other accessory threads, to find the best aftermarket stems, wpa, hooks, and other glass pieces to get the most out of it with the purest possible flavor