Don't know anything about that product name but coir is good.
You won't wreck any plants. I use coir all the time (mixed
with other stuff) and one advantage is it holds together
so that when you transplant you will get the whole root
system out of the cup, not leaving any behind.
I would go ahead and use it and not worry.

Thanks Sneezer...

I now want to ask what else do you put into the mix?
I transplanted a few today, the mixture is odd..it holds some water and when it is too much it leaks out...which i guess helps the plants from being too wet, just hope they don't dry out if I am away for two days!! thanks again,
Martha/zucchini

Actually I make my own mix using Miracle Gro Moisture
Control potting soil. Your description of the SOIL BLOCK
sounds about the same. Just for reference, the MG has a
little perlite in it and a lot of ground up wood waste
but it's a pretty decent product if a little expensive.
I then mix it about half and half with Hyponex potting
soil, which is the most disgusting, heavy stuff I can find.
If you can't find it the cheapest potting soil available
is OK. Now I'm not saying I like this stuff but I use it
for one quality and that is its heaviness. Mixed with the
MG it provides a soil that holds together and prevents
the root system from breaking apart when transplanted
again. Then I add some more coir, which you can buy in
blocks. Your SOIL BLOCK, if you need to reconstitute it
with water may have enough coir in it. Yes, the mix should
leak some water after it is done absorbing what it wants
but the coir holds quite a bit and portions it out to the
plants as they need it. A two-day absence? That would
depend on how big the plants are. If they are still small
you can water them well just before you leave and when you
get back, they will be just fine. As they get older and
bigger, they start to transpire more and they will drink
a lot of water in just one day. Mine are under bright lights
though, so it may make a difference. You may be
able to judge by how much water they are using each day
to know how far you can press it. If they are using a lot of
water each day and seem dry before you water, you may
want to ask someone to come in and check.
Good Luck!

Thanks, sneezer...

When I pot them up again to the larger containers, hopefully next month, i will use soiless mix. I don't add anything chemical to my soil as garden organically....they are under shop lights now,one warm one cool...and the few I transplanted looked good when I left them this morning...I will get home again tomorrow night. This has been my usual routine over the years, and they do ok, even if the get thirsty...was just not sure of this coir stuff. but it looks ok...thanks again...martha/zucchini
I can't plant anything outside (except peas) until June...so it's a long wait and watching them grow indoors is great.