IKEA do a great selection of frames and I started off using them for my own work. They are a great way to start getting something out there for an affordable price.
However, I would buy 10 frames and have to take 8 back to swap them for new ones because they were badly fitted, the glass/acrylic was damaged or they just fell apart when I put my print in them!
The price difference between an IKEA frame and one of mine is not too significant when you consider what you are getting. The mouldings I use are made of wood, not a soft compressed pulp. They are glued and v-nailed together for extra strength. The print is stuck down flat onto a 5mm foamcore backing with an acid free ph neutral matboard, for a solid finish. Finally, it's all put together with framing pins, fully taped back, felt bumpers and a wire hanging system.
By all means give the IKEA frames a go and see if they work for you, I used them for about a year before I started making my own. Although I can make prints to fit IKEA frames I don't offer the service of putting the prints into the IKEA frame.
If you need custom sized frames then definitely get a quote from me.