No mod is infallible and how you treat it also matters. I have to say, I'm not the hugest fan of the picos, especially the new one. I sold mine, because I didn't care for the build quality, to me it was poorly machined and whatnot. An earlier pico, I bought off ebay (I was new) and it arrived broken, and with clearly "rebuilt" coils. No thanks, it went straight back.
Despite my record with them, I will recommend them to new users, as they do have their pluses, and for the price, well, they can perform well. But, if it were me, I'd consider an innoken mod, maybe the eleaf invoke, it's almost as small as a pico but much better design and two internal batteries, so great battery life, and it's light and portable while still being very well designed and easy to use. I really recommend them now as a starter device, because I love mine so much (I won it, and I'm glad I did). Feels great in the hand, light, easy to use, and great quality for a reasonable price.
You can put any topper you want on there, including a MTL topper, and just enjoy great battery life. I don't know what it is with me and picos but I think there are far, far better setups out there for not as much money. I really like certain mod makers, and while I do like some things from the manufacturer's of the picos, I am far more likely to recommend an Aspire Zelos starter kit that comes with a Nautilus 2 topper, they are internal battery mods, in case that is what you are looking for but good reliability and build quality for the price, and as you continue trying new equipment, the mods work well for many MTL tanks. Nice small formfactor as well. If it were me, honestly, I'd replace with a two battery removable mod, unless you are looking for something super tiny and/or very low budget.
Best of luck,
Anna
