I use to play Penta when they first came out but have since switch to Z Star as I find the old Penta too soft off the driver and not very durable. However I love em for mid/short iron in and putter as it just hop and stop.
Have not tried the new TP-5 but just bought 3 dozen TP-3 to give it a try and play em last weekend. Feel off the driver is a little harsh (as compare to Z Star) but the short iron/wedges are similar to old Penta - hop + stop with plenty of spin. However it's slightly clickier off the putter than the old Penta, which is really soft - almost mushy soft.
OOoh the new TP-3 is also a lot more durable than the old Penta.