The new series looks pretty but the stories aren't anywhere near as interesting or exciting add the original 60's version. Far too many episodes revolve around the Hood and/or the Mechanic who are mere shadows of the old, evil Hood.
The biggest annoyance though is what I call the "K9 effect" because, like Doctor Who's old companion, whenever IR have a problem Brains has "coincidentally" just crafted/ installed/ tested exactly what they need for the mission.
Another problem is the Tracy brothers. Several act like spoilt children most of the time. You wouldn't trust them with the TV remote, let alone a Thunderbird vehicle!
Overall a fun watch for under 10's but if you have the originals, let them watch those instead.