Their good but with the special rule for their armour being changed from not allowing the bonus for Melta and Lance to just Melta they are alot easier to deal with and at their high points cost aren't as strong as they used to be. The guy I play against the most uses his with his Minoutars Space MArine Army and I use my Eldar tho we don't play optimized lists( I only field 2 wave serpents and actually use a falcon). When they were immune to the lance and melta special rule I just ignored it unless I had no better targets. I kept my armour far enough away to take away worthy targets of the melta and just took the thunderfire cannon shots, there were very few games were it had any major impact at all. Now that lance weapons effect it, if he uses it my bright lances take it out pretty easily or I use my swooping hawks haywire grenades, with it having no assault ramp and a capacity of only 6 you don't really have to worry about a strong CC unit charging out of it.
I think it could be good against certain armies and now that chaos marines can take them i think they have a place in some armies but def aren't as good as they used to be. I mean 325 pts is alot, 50 more and you can have a Knight.