It all depends on your expectations.
I like mine and I happy with them but ends up costing more than triple carbs and runs better than when I had it on triple carbs.
Finding someone reliable or close by who can tune them can be as difficult trying to find someone to tune carbs.
Just had a look a the website and if you are not displaying a car but parking in the public car parks they are now charging £5 for parking but not on others.
https://events.fastcar.co.uk/japfest/public-tickets/
https://www.silverstone.co.uk/term/japfest
For Christmas day I have mostly been refitting the 4 pot calipers on my A series metro oh the joy of 3 bleed nipples on each caliper and hoping I can free of the rear ones to bleed the whole system.
Ideal as I have treated myself to something from Technotoytuning for my fairlady so this will be...
I was driving past a MOT station and I saw a silver 240Z and I thought " what is that !!!!!! It looks amazing" I pulled in and asked them what it was. I think that was about 30 years ago and now on my 5th Zed.
I had a powerlite one on my metro and it was knackered after less than 2 years and 2000 miles as it had gone rusty on the inside . I was very disappointed with it and it would have cost as much to repair as a new powerlite one so I just got a bog standard one off ebay.