Hi.
I have gigged a lot with their "single" bigger brothers TL505's and they do their job well enough.
Any of the TL twins (or singles for that matter

) are a major PITA to haul around though, so the weight/SPL ratio isn't nowhere near what the modern enclosures are capable of. The low price is on the TL designs side, so those old designs are used and reused over and over again.
That said, any of the BFM designs probably smoke any ancient TL design down to the ground.
Regards
Sam