Looked at a few reflection filters and went for the SE Electronics Reflexion Filter X, as it didn't seem too expensive and a worth while punt, to see if it made any difference to vocal quality in my home studio.
We normally record in my bedroom, as it's the most driest, vocal booth-esque sounding room of the house. The difference was definitely noticeable on first recording with the filter, the vocal track was definitely more focused and drier. It wasn't as open and airy sounding as before. This is perfect for me as I like to record rock vocals with Shure SM/Beta 58's and need a good punchy, hard hitting vocal. I haven't had any experience with ballad type condenser microphones yet though.
The Reflexion Filter X is quite bulky so you'll need a solid, sturdy stand so it doesn't topple over as it'll make the stand a bit top heavy. It's built well and definitely worth the money if it's your first venture into reflection filters and I'd recommend it to any home studio user wanting to get a better quality vocal track.