I've used Thai P before (Tren A). It's thick as molasses, but I heated it under the tap for a few minutes and it flowed nicely through a 23g pin. Did not seem underdosed, maybe a little on the overdosed side, as my nights sweats and insomnia increased once I started it.
Am waiting to try some of their EQ next, but have heard the same things about it, thick, thick, thick, but good to go.
Hopes this helps.