Squad Boyle was a pretty late addition to my Sin Eaters army. They nonetheless got used in a tournament or two as well as in a number of casual games.
My income levels at the time were pretty low (a perennial condition at sho3box towers Im afraid) and so I used a few components that up until that point I had been avoiding, in the interests of keeping things cheap.
Most notably in that regard was the use of the quite goofy zombie head with the beard and the tongue hanging out from the GW zombie sprue. For the earlier squads I had avoided that head as I regarded it as a bit too wacky for my purposes. Finances were low and I had a number of those heads sitting around so I decided to use one along with the new-at-the-time Space Wolf heads (and a Khorne head).
At that late stage of painting an army (roughly about 80 models or so into the project I would say) painting techniques tend to have evolved, usually in the interests of expediency. In addition to that slighly more oddball units and concepts start to crop up, usually in my case in an effort to keep interest up. Hence the heavily armed unit of jet pack-ing zombie space soldiers.
There has been some crazy talk about playing some small games of 3rd ed 40K amongst SOS and MT recently. If my resolve breaks and I engage in some of those shenanigans it will likely involve games that include the more elite and oddball units like Squad Boyle.