Actually I wanted to make a review of B2 Gold on revspin but the review was just too big so i post it here
BLADE: 729 BLUE ARYLATE FH:729 BATTLE 2 GOLD BH: YINHE JUPITER 3 ASIA
The rubber is in vacuum package. From the package I've noticed a very strong smell. The rubber isn't heavy, lighter than H3 Neo. The sponge is 40 degree smwhere between H3 sponge 39 and 40. And the topsheet is rock hard.
1)Firstly tried the B2 Gold in black with 2 layers of Haifu Seamoon commercial yellow on FH. I felt I can't miss. All the shots I get on the table are very dangerous with CRAZY amount of spin, really good speed and the balls dived really deep after the bounce
and vere hard to return. Unfortunately the booster evaporated in 2 weeks and i felt I can't play it anymore. It became like a brick.
2) Applied the booster onto the 2 layers of old yinhe glue. The rubber didn't react and I've got I have to remove the old glue to make the rubber playable.
3) Glued it without boosting with organic speed glue on Stuor Long 5(V). I got really crazy spin balls but they were slow. The glue evaporated but the rubber still was playable enough.
4) My coach gave me a BTY Timo Boll ALC. I removed the glue and applied 1 layer of booster. First 2 days it was a fairytale. I recalled the feelings I loved so much about this rubber in 1)
5) The booster evaporated ;( It became a brick. I thought if not the booster evaporates that fast maybe the water based glue becames hard that fast(the glue was 1 year old). I got an idea to glue the rubber on 729 Blue ALC with speed glue.
6) 729 BLUE ALC with speedglued B2 Gold. I think i finally broke in the sponge. The rubber first time was really good even without booster. But I felt different to what I described in 1). First of all, the rubber was a bit harder. And it required right technigue. All i write below is true when you brush the ball well. If you squeeze into the sponge a bit flatter(on topspins) the balls go into the net.
Here is the TRUE REVIEW(without booster) WITH SOME COMPARISONS:
The sponge is hard(54 I would say on ESN) but the rubber feels harder for example than Gewo Coddex 54 because of the hard topsheet. The topsheet is SUPER GRIPPY but mine is almost non-tacky like the new H3. Some lucky people get really tacky sheets(watch the review on YT by "Roning-Team" it's in russian but you can use the auto-translate subtitles).
Speed: H3 Neo National BS 40=Gewo Coddex 54>=B2 Gold>Stiga Mantra H>H3 Neo 39>729 Geospin Tacky>Reactor Tornado V5
Spin: H3 Neo National BS 40=>B2 Gold>H3N39>GewoC54>729 GT=RT V5=Stiga Mantra H
Arc(from high to low): GewoC54>H3N39>StigaMH>729 GT>H3NNat BS40=RT V5>B2 Gold
The easiest to create an arc with: B2 Gold=H3NNat BS40
Serve: B2 Gold>H3NNat BS40>>all the others rubbers mentioned
Short Game: B2 Gold=H3NNat BS40>=all the tacky rubbers mentioned>Stiga Mantra H
The most dangerous balls to return: H3NNat BS40>=B2 Gold>H3N 39>others
Control: it is subjective but I felt: H3N 39>B2 Gold>Stiga Mantra H> H3NNat BS40
Control When BOOSTED: B2 Gold>>>>>H3N 39>729 GT>H3NNat BS40> GewoC54
Durability: B2 Gold after 70 hours of playing became a bit more tacky, still super grippy, fast and didn't bubble unlike all the Hurricanes I tried.
Overall: B2 Gold is the best beast rubber I've ever tried! You just need to understand how to play with it and you need a fast blade more on the stiff side(outer ALC(Viscaria))