I may; I have used them in several guns and magazines so far and they have exceeded my every expectation. I use them in my GHK m4, I use them in my G&G gr16 and I used them in my TM Glock, all running 6.3 TBBs.
To memory I have not had a single jam or blockage, well one time but the hop up was on full, wound it in and it shot again. I have never seen a double feed with them and they have never mis fed to my knowledge.
I have used both the .28 and the .25 flavors and found them both very accurate and consistent, on a 10m range they hit 10/10 on the base of a coke can in all guns, pistol to DMR. with the [SIZE=14.4444446563721px].28 [/SIZE]offering a decent punch on metal competition "poppers" that the .25s struggle with.
The [SIZE=14.4444446563721px].28 [/SIZE]were more accurate during an IPSC session than the .25s. In open field the 2.8s hold their trajectory and range with very little deviation, they will deviate obviously by external factors but they seem to be the most consistent. I use .25s for indoor CQB because they are slightly cheaper.
I'm also a big fan of Taiwanguns P&J Bio bbs, although I have had some in my garden now for over 6 months that still are not degrading, they are nicely finished, consistent and accurate.
I used to use Blaster Devils and they were good bbs, quite accurate, very rarely jammed and when they did I can't say for certain it was a bb issue or a gun/magazine feed issue, but I find the bastards more consistent and more accurate.
if im being critical I actually found the .20 black devils I have for chrono testing often miss feed and feel a bit greaser and appear quite shiny in comparison to the white .25 devils.
The BBB are quite smooth and matte with no visible mouldings or imperfections. The only thing that lets them down is the bag they come in can sometimes split in the corners, but I believe they are addressing that according to facebook.
Its all anecdotal and circumstantial of course and just my 2c, but they just seem to be a much higher quality and better performing BB, I don't know how or why, but they just work for me. Its only a couple of quid extra, (less than a pint) over a bottle of blasters and I would definitely recommend at least trying them. You may be pleasantly surprised.
It may be worth noting I use low caps and gas guns so i'm not shooting 2000 shots a day. if you are a bit ammo hungry I can for see the cost factor playing a bigger role in choice. I have bought some from Patrol Base and the seller on Ebay, who is slightly more expensive, but more convenient than driving from manchester to leeds.
Rumors are that Redwolf will soon be selling them too.
[ETA] Agghh zero ones! I forgot about those horrible POS, one of my local sites use them for a game where you have to find the ammo and are forced to use the bbs they provide, they jammed and broke the speed loader before they even got into the magazine.