This is my favourite blade by far.
My playing style is a close-to-table two-wing attacker and this soft controllable Arylate blade gives me tons of confidence to generate spin in combination with placement. Nice large sweetspot.
Quality of the blade is excellent and durability is great, since I possess and use this blade for many many years.
Strength of this blade are looping and flicking close-to-table. Short play is not a problem either. At mid-distance the Arylate kicks in, so in that respect it's a bit unlineair. It's not a high-speed blade but the selection of rubber has it's influence on the overall speed. Personally I play with the Donic Bluefire JP rubbers but I've been told this frame also pairs nicely with Tenergy.
I possess a FL handle, which nicely fits into my hands, which are relatively small.
Unfortunately it has been discontinued a while ago (2010). However you can still find TB Sparks in the FS section for a reasonable price.
Butterfly Bazelart supposed to be exact the same blade as Spark.
If you want a blade like this but with a little more power, UpsidedownCarl on the forum has advised a TB ZLF. It is a lot like the TB Spark but faster and the Zylon is not quite as soft as the Arylate.
http://www.tabletennisdaily.co.uk/forum/showthread.php?8091-Composite-or-all-wood/page2
Both Keyshot and Innerforce AL are also a little bit harder and faster with simmilar feeling comparing to spark.TB AlC/Spirit are even faster.
Conclusion: This blade is for close-to-table loopers who prefer control above speed. Good blade for players who have passed the beginners stage and are ready to develop their looping skills.