Ordered GR 80 Necro. Really happy with communication leading up to the deal. Will update with a full review when the boost is done.
Done

Ok so now 3 days later its done, just awesome. And I'll tell you why that's even more impressive. I had auth and sms protect on and set to ask once weekly but for some reason since I think patch 2.5 if u log directly into Diablo it will ask for auth every time. I wasn't sure of this until now but yes it seems this is the case. So ofc during these 3 days there were times when I was sleeping and he needed an auth or I was just slow to respond due to well life. I would also like to add that at no time did he get mad at me for this he could totally understand why I wanted to keep max security on. 3 days is very impressive.
Hadn't played Diablo for awhile so I wasnt totally sure of what I needed (stash tab cap?, exact Necro build) even when I contacted Winterblades but he was very friendly and 24hours later I knew what I needed and we made a deal for the GR80 Necro I was very happy with. I got a substantial discount because I had the 3 gems needed for the build at a high enough level and also had gems for the augments. I also had "some" mats around (50k DBs cough) from an earlier boost and we discussed how much he could use (capped use at 5k, he used 3k). We also discussed cubing and the mats involved in that and came up with a cap he could use there aswell. I then organized the stash so he would have an easy time to handle new gear, sorted the payment and boost was started like 5minutes later.
And now it's done. I loved the service. The communication on skype with Winterblades was super nice and at all points I knew my account was in good hands.I have used other boost services before (not gonna name them cause at the time I was fairly happy with them aswell) but this is by far the best one so far. This time I could just tell it was totally hand played, Other boosts I've used I have suspected botting but tried to convince myself nah cause the price was right or whatever. But this time you just knew it was hand made cause there was constant communication from Winterblades (about gear drops or build talk), the stash was organized super nice. With other boosters sometimes there is great communication until they get your cash and then its just silence. This was not the case here.
I can highly recommend the service. I will use it again myself for sure. If you have issues you wanna discuss like I had (mats, discount cause of gems or say very high paragon) then you should really talk about them and be assured that what you agree upon will be respected.