My English isn't that good but I'll do the best I can.
How good is service? very good, e-mails are always answered within 24 hours. Very friendly!
How healthy are the plants appon arrival? They are always healthy
How big are the plants appon arrival? Always quite small... Size is in the description.
How good is the pricing for common plants? Very cheap but the plants are small (extreme plants is a little more expensive but the plants are bigger)
How good is the pricing for rare plants? Very good.
How good is the range of species? I guess they have one of the biggest range of all the cp-sites.
How good is shipping (to US) speed? I never shipped to US.....
by the way --> You get a free plant every time you order.