For portable non-concentrate, Mighty by Storz and Bickel is hands down the best device I've used. The engineering is flawless: amazing battery life, extremely durable, easily replaceable wear/tear parts, use while charging, fast heat up times, a poker built into the base of it... I could go on. It was pricey but I've had it 4+ years, with no signs of decaying battery life or any non wear/tear part replacement, despite a lot of use and a lot of abuse.
